About this item HEAVY DUTY OFFICE CHAIR SWIVEL TILT CONTROL - TOPDEEP Office Chair Replacement Base is made of the 0.1' thicken steel bracket which is sturdy and durable for chair tilt mechanism replacing. Large 350 Pounds Load Capacity.The seat plate has a fixed mounting hole, mounting hole distance: 10.2' * 6'. The durability of the base will ensure your chair's base is firmly sound for many years. HEIGHT ADJUSTABLE AND 360° SWIVEL - Swivel Chair Base Replacement is equiped with Standard gas cylinder, has a 5' travel from lowest to highest. Swivel Chair Base adjust from 14.5' to 19.5'. The practical chair gas lift piston is ideal for various office chairs. Adjustable stroke length can meet most of your need. 360-degree swivel action for easy transfer. UNIVERSAL SIZE - Fit most chairs. The office chair base kit has universal sockets and works perfectly with almost every office chair, gaming chair, desk chair, task chair and swivel chair on the market. Great for replacing and repairing