--- https://thunderx3.com/product/bc1-boss/ Maximum weight <150kg Recommended weight <125kg Foam type High density foam Frame type Plywood Adjustable armrests N/A Adjustable backrest N/A Mechanism type Butterfly mechanism Rocking mechanism Yes, 3° – 18° Rocking mechanism lock N/A Gas lift class & height BIFMA tested level 3, max. 100mm Base size & type 350mm nylon base Caster size & material 65mm nylon caster Cover material Leatherette with carbon pattern Overall dimension (W x D x H) 65 x 70 x 118-128cm Backrest dimension (W x H) 55 x 75cm Seat dimension (W x D x H) 50 x 52 x 47-57cm Armrests dimension (W x H) 65 x 67-77cm Product weight 16.8kg