English to Italian Other Other gaming chair

https://www.amazon.co.uk/dp/B01M4RE6X1

Specifications: Tilt Locking mechanism 90-180 degrees angle adjuster Height-adjustable gas spring cylinder Height adjustable and rotatable armrest Black metal star base Easy to move casters Orthopedically and ergonomically designed High-Quality PU Synthetic Leather material Headrest pillow and lumbar cushion are included Load capacity up to 330 pounds Height 50'' Width 26'' Length 26'' Height Adjustment (Seat From Floor): Lowest 17'' Heighest 21'' Armrest 3'' Diameter Of Wheel Base 26'' Width Of Backrest 21'' Width Of Seat 20'' Length Of Backrest 29'' Seat Depth 19'' Seat Length 24'' Back Thickness 5''

molla a gas? ammortizzatore a gas? non so come integrare "cylinder", grazie