Transverse and longitudinal partition wagons are made of fire-resistant, moisture-resistant plywood, lined with plastic, with the necessary fasteners. Non-strength partitions are made with the use of cellular aggregate to lighten the weight of the set. Wall fixing elements are made of stainless steel to prevent corrosion.

Compartment fireproof partitions are a structure consisting of two sheets of plywood 10 mm or 19 mm thick each, between which a galvanized steel sheet 0.55 mm thick and fiberglass is installed. Plywood sheets are connected with screws. On the outside, the plywood is lined with plastic 1.6 mm thick.

A set of facings for the side walls consists of:

• wall cladding elements of the corridor;
• lining elements of the walls of the service compartment;
• cladding elements of the conductor's rest compartment walls;
• lining elements of the walls of the passenger compartment;
• toilet wall cladding elements.

Siding of the side walls is made of heat-resistant thermoformed plastic with the necessary fastening elements. Decorative aluminum or plastic profiles are installed at the joints of the panels. The facing surface is resistant to the influence of detergents, and chemical and thermal disinfection.

The window panels are made with channels for supplying warm air to avoid fogging of the windows.

The vestibule cladding kit consists of:

• flat wall cladding elements;
• doors of coal boxes;
• cover of signal lights;
• handbrake frame (fiberglass);
• doors of the boiler room.

All vestibule cladding elements are made of stainless tetrapolished and mirror steel.

Set of ceilings carriage premises consists of:

• slanted corridor ceilings;
• ceilings of a large corridor;
• ceilings of a small corridor;
• ceilings of toilets on the boiler room and non-boiler side;
• ceilings of vestibules of the boiler and non-boiler sides;
• ceiling of the service compartment;
• ceilings of the driver's rest compartment;
• nine passenger compartment ceilings.

The ceilings of the car are made of 1.2 mm thick sheet steel with a powder coating.

The design of the ceilings provides the necessary rigidity during the operation of the wagon.

The weight of the ceilings is minimal.

In the ceilings of corridors, vestibules, and hatches are provided for servicing communications located above the ceilings, as well as for installing lamps, fire alarm sensors, air distribution devices, and sounding devices. Hatches have latches that can be opened with a three-sided key and are made in a uniform style with the rest of the ceiling panels. LED lamps with several lighting modes are installed in the ceiling.

To exclude the possibility of arbitrarily opening the covers of the ceiling hatches, each hatch is equipped with locks for a three-sided key and safety belts with carabiners.

A set of interior doors consists of:

• two doors from the vestibules to the carriage;
• doors of toilets on the boiler room and non-boiler side
• doors of the passenger compartment (from the oblique to the large corridor);
• service compartment doors;
• ten passenger and service compartment doors;
• doors of the boiler room;
• swinging doors.

All doors, except for vestibule doors and the boiler room, are made of fire-resistant plywood, lined with plastic, with the use of cellular filler. The door leaves are made of a frame structure made of a plywood frame with the use of paper honeycomb fire-resistant filler. Door frames and door moldings are made of polished stainless steel.

The doors of the passenger compartment and the door of the service compartment are made sliding with the upper location of the door hinge and without the lower guide. Improved sliding door mechanism: bearings are installed on rotating elements, and wear-resistant materials are used.

The doors of the toilets on the boiler and non-boiler sides are made of rotary (inside the toilet) with an electric locking lock, which takes into account the functionality of the ecologically clean toilet.

The doors of the boiler room (from the vestibule) are made of metal of the leaf type, are closed with a three-sided key, and have latches in the closed position.

Hardware and door hinges are made of stainless steel.

A set of heating pipe enclosures consists of:

• fences of the corridor part;
• enclosures in the boiler room and non-boiler side toilets;
• enclosures of compartment parts;
• fences of small and oblique corridors and service compartments.

The set of fences is made of a single design of stainless tetrapolished steel. The casings and brackets of the fences are made of stainless steel. The fences have shaped holes for the passage of warm air, are attached to curtains, and are locked with a three-sided key.

Handrails made of stainless steel with a step-less joint, non-removable, taking into account access to emergency windows. Urncupboards under the litter box are made of stainless steel.

Passenger compartment furniture. The following equipment is installed in each passenger compartment:

• two lower sofas, hinged installed on the longitudinal partitions of the compartment and resting on the chests located below them; the chest is made of sheet metal with additional treatment with anti-corrosion agents; raising and fixing the lower shelf is carried out with the help of a gas spring;
• two backs of the lower sofas hinged on the longitudinal partitions of the compartment. In the daytime position, the backs of the lower sofas are fixed in a vertical position. At the same time, they are equipped with swivel armrests that separate the passenger seats. When the back of the sofa is in a vertical position, the tucked-in bed linen is fixed with rubber straps. A folding table is installed in the middle of the backs of the sofas between the two seats for passengers. In the night position, the backrests are lowered onto the lower sofas, forming two lower berths. On the back side of the back of lower sofas there is a niche for placing a removable mattress;
• two stationary headrests installed above the backs of the lower sofas with built-in individual LED lamps;
• headrests between stationary zones with individual lamps consist of 3 opening boxes, the middle of which has a trouser holder;
• the two upper berths are equipped with mattresses placed in shelf niches. The upper shelf is equipped with a spring mechanism for removing the force when lifting the shelf;
• above the upper sleeping shelf there is a block with three opening boxes, the middle one of which has a trouser holder;
• individual LED lamps are installed on the longitudinal partition of the compartment in the area where the boxes are closed near the window;
• luggage niche;
• one folding table, equipped with devices for holding and opening bottles, made of fire-resistant plywood lined with plastic;
• hooks for clothes;
• a mirror installed on the inside of the door;
• a place to mount a TV;
• for access to the upper sleeping place and to the luggage compartment, stairs are provided, built into the partition, without protruding parts.

All upper berths are hinged and equipped with safety rails.

Compartment accessories (handrails, trouser holders, fasteners, handles) are made of stainless steel.

A passenger compartment with ordinary compartment furniture is possible.

Furniture in the driver's rest compartment. The chest is made of sheet metal with additional treatment with anti-corrosion agents. Furniture upholstery material is fire-resistant, wear-resistant woolen fabric. The lifting and fixation of the lower shelf is carried out with the help of a gas spring. The upper shelf is equipped with a spring mechanism for removing the force when lifting the shelf. Compartment fittings (handrails, trouser holders, fasteners, handles) are made of stainless steel.

A set of office compartment furniture made of thick HPL plastic, resistant to moisture and aggressive substances. The planning and design of furniture takes into account the placement of equipment: microwave oven, refrigerator, coffee machine, etc.,and increases the comfort of the room.

Elements of toilets made of fiberglass with improved design and layout to increase passenger space.

Used anti-vandal elements of the washbasin (faucet, mirror, and elements for placing hygiene products). Accessories - made of stainless steel.