--- https://thunderx3.com/product/tc5/ Maximum weight <150kg Recommended weight <125kg Foam type Latex + High density foam Frame type Steel Adjustable armrests Yes, three-directional Adjustable backrest Yes Mechanism type Butterfly mechanism Rocking mechanism Yes, 3° – 18° Gas lift class & height BIFMA tested level 4, max. 100mm Base size & type 350mm steel base Caster size & material 65mm nylon caster Cover material Leatherette with carbon pattern Overall dimension (W x D x H) 66 x 70 x 125-135cm Backrest dimension (W x H) 56 x 83cm Seat dimension (W x D x H) 54x 54 x 47-57cm Armrests dimension (W x H) 66 x 61-78cm Product weight 21.5kg