Return to the office without forgetting a single thing! Buy Office Chair with Headrest Agudo Piqueras y Crespo 840B23C Black and be the envy of your colleagues!. Colour: Black. Structure: PVC. Chair with Armrests: Adjustable. Material: Leggings. Wheel material:. Rubber. Nylon. Seat material: PVC. Hours of use: 8 hours. Backrest: Polyamide. Piston: Gas. Mechanism: Synchro. Maximum seat height: 58 cm. Minimum seat height: 45 cm. Total width: 60 cm