Description Manufactured with stainless steel material, the chair saver kit durable for long-lasting use. The chair saver kit comes with a wrench, allow to install easily, easy to install, suitable for most office chairs or gaming chairs with a cylindrical. Features -Color:Black-Material:Stainless steel-Size:4.50X1.50X1.50cm/1.77X0.59X0.59in-Size:7.30X2.00X0.50cm/2.87X0.79X0.20in-Size:2.50X2.50X1.40cm/0.98X0.98X0.55in-Internal diameter: 25mm-External diameter: 45mm- Chair saver is easy to install, come with wrench for simple installation, no professional skills required.- Use this chair saver to fix sinking chair, prevents damage caused by sinking chairs, extends lifespan.- The chair saver is suitable for various office chairs and gaming chair, with high compatibility.- Cylinder fixing ring, stable and reliable, made of stainless steel, practical and strong to use.- Chair saver, stop sinking without replacing the gas lift cylinder, time-saving and effortless.Packing list: 1 x Chair Saver1 x Wrench