These chair leg protectors are made of high quality rubber that will provide long-lasting protection. Inner diameter of rubber caps (bottom): 25mm. Inner diameter of opening: 25mm to prevent feet from slipping. External diameter: 28 mm. The rubber tips will protect your floor from marks and scratches. Slides quickly over furniture legs for a clean, protective look. Easy installation. No need to glue them. Simple to install and do not come off easily. You can take them on and off repeatedly. Super thick and sturdy, the high-quality rubber caps withstand the rigors of outdoor use in sunny or rainy weather. Versatile use for outdoors, patio, school, etc. Set of 12 black rubber caps for chair legs, table, for indoor, outdoor, patio, garden or office. p> Noise-proofing. Chair leg covers eliminate annoying noises, keeping you in a comfortable and quiet environment. Non-slip. < p>Thanks to the special surface treatment, tables and chairs stay in place. You won't easily fall off a chair with leg caps. Anti-scratch. Chair leg caps protect carpet from snags and hard floors from scratches. No smell. Made of premium rubber, no need to worry about the strong chemical smell. Function: Material: rubber. Color: black. Inner diameter of rubber tips (bottom): 25 mm. Inner diameter of opening: 25 mm. Diameter outer: 28 mm. Package contents: 12 rubber feet tips. Note: Please check the size before buying. The chair leg protectors fit chair legs with a diameter of 2.5cm or smaller chair legs.