BiMi Heavy Duty Class 4 Replacement Black 9" Gas Lift for an Office Chair

BiMi Heavy Duty Class 4 Replacement Black 9" Gas Lift for an Office Chair

BiMi 50137 Replacement Office Chair Tilt & Lock Lever Base Plate Mechanism Large 150x255mm

Sytopia Office Chair Base, 28 Inch Office Chair Base Replacement with Reinforced Metal Legs (2200Lbs), Bottom Part for Most Universal Gas Cylinder and Caster Sockets (Matte Black)