Return to the office without forgetting a single thing! Buy Office Chair with Headrest Alocén Piqueras y Crespo B10CRNC Black and be the envy of your colleagues!. Colour: Black. Material:. Polyamide. Leggings. Certificate: Without certification. Structure: PVC. Chair with Armrests: Adjustable. Wheel material: Nylon. Hours of use: 8 hours. Backrest: Polyamide. Piston: Gas. Mechanism: Synchro. Maximum seat height: 56 cm. Minimum seat height: 42 cm. Total width: 61 cm