Description Manufactured with stainless steel material, the chair saver kit is durable for long-lasting use. The chair saver kit comes with a wrench for easy installation and is suitable for most office chairs or gaming chairs with a cylindrical base. Features - Color: Black - Material: Stainless steel - Size: 4.50 x 1.50 x 1.50 cm / 1.77 x 0.59 x 0.59 in - Size: 7.30 x 2.00 x 0.50 cm / 2.87 x 0.79 x 0.20 in - Size: 2.50 x 2.50 x 1.40 cm / 0.98 x 0.98 x 0.55 in - Internal diameter: 25 mm - External diameter: 45 mm - Chair saver is easy to install and comes with a wrench for simple installation; no professional skills required - Helps fix sinking chairs and prevents damage caused by sinking, extending chair lifespan - Suitable for various office and gaming chairs with high compatibility - Cylinder fixing ring is stable and reliable, made of stainless steel for durable use - Stops chair sinking without replacing the gas lift cylinder, saving time and effort Packing list: 1 x Chair Saver 1 x Wrench