Set of 8. The caster cover diameter is approximately 5.3 cm, and the width is about 15 mm. Applicable caster diameter range is 5.7-7.9 cm. *Notes: ① Not compatible with single casters, applicable to double casters. Please understand. ②: Applicable to casters with a distance of 5 mm or more between the wheel and the axle. It may be a little tight when using it for the first time, but you will need some force to attach it. Please understand. DZTSMART Suitcase Wheel Covers, Set of 8, Tire Covers, Luggage Wheel Covers, Silicone, Silent, Scratch Prevention, Stain Prevention, Anti-Rolling, Anti-Slip, Suitcase Foot Covers, Luggage Protection, Noise Reduction, Ground Protection, Wheel Protection, for Travel (Gray) -------------------------------------------------- ◎ Please understand that items are stored at home, packaged simply, and shipped using recycled materials. ◎ Please check the actual photos for the condition of the product. ※ Some parts of the site may be quoted. To offer the product at a slightly lower price, we may ship it without the box due to shipping costs. If you wish for anonymous shipping, please let us know in the comments section before purchasing. ⚠️ We have opened the item once for inspection, so we are listing it as "Like New". #leshika's product list is here 46-53 08.18