--- https://thunderx3.com/product/dc1/ Maximum weight <150kg Recommended weight <125kg Frame type Plywood Foam type High density foam Adjustable armrests Fixed Adjustable backrest N/A Rocking mechanism Yes, 3° – 18° Rocking mechanism lock N/A Mechanism type Butterfly mechanism Gas lift class & height BIFMA tested level 4, max. 100mm Base size & type 320mm nylon base Caster size & material 65mm nylon caster Cover material Leatherette with carbon pattern Overall dimension (W x D x H) 64 x 64 x 111-121cm Backrest dimension (W x H) 53 x 70cm Seat dimension (W x D x H) 50 x 48 x 45-55cm Armrests dimension (W x H) 64 x 64-74cm Product weight 15.5kg