5 cm thick, 32 dns cut hard sponge is used on the seat of the chair. The arms of the chair are made of 1st class plastic material by injection method. T fixed arm is used. The leg of the chair is 65 cm. diameter of the five-piece aluminum is bright polished and the outer thickness of each five-part part of the leg is 35mmX50mm. The leg of the chair has five wheels and the wheels are manufactured using PA6 nylon material. The main body of the backrest part is made of 1st class plastic by injection method. There is a PP plastic frame in the frame. It will be furnished with high-strength polyester mesh fabric inside the frame and then the back will be mounted on the main body. The seat of the chair is made of 1st class plastic material by injection method. / there will be a headboard with a forward and backward movement mechanism. The carrier body of the headboard will be 6 x 70 mm chrome plated. The backrest of the seat is mounted to the ergonomics of the waist and there is a lumbar support that can move up and down. The mechanism of the chair is made of 3 mm and 2 mm DKP sheet metal. , is a swing-back swing arm and the mechanism can be locked in more than 2 positions. The shock absorber of the seat should be movable up and down and with gas. 0.60 mt of leather or fabric is used in the upholstery of the seat. The leather or fabric used in the upholstery of the seat is seamless and without defects. The product is delivered as assembled.