Whether you are looking to fix your height adjustable bar stool or looking for a square plate mechanism for your own DIY project, our square plate mechanism has got you covered. Made from durable materials, the square plate offers excellent durability and a lever to activate heigh adjustable gas lifts. FEATURES: Lever for Height adjustments - Chair height adjustment lever to activate office chair gas lift's lift mechanism. Gas lift sold separately. High-Quality Build - Engineered with sturdy steel plating, ensuring dependable durability and longevity. Easy Installation - Compatible with most office chair models for quick upgrades. SPECIFICATIONS: PLEASE REFER TO THE PRODUCT DIMENTIONS IMAGES FOR ACCURATE MEASUREMENTS. What's in the box 1x Square Plate Mechanism