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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 12