【Outside Diameter Size】: 38mm. If the outside diameter of your chair legs are 38mm, then these hemispherical plastic pipe plugs chair leg caps will fit. (the pipe plugs are suitable for pipes with a wall thickness of 0.6-1.5mm). We are committed to providing quality product and service to our customers, any questions please feel free to contact with our professional after-sales services. 【Durable Material】: Made of durable plastic material, which is a sturdy material with wear-resistant, non-toxic, no pungent smell, not easy to break, high hardness and a long service life, safe for children & pets. Smooth bottom of plastic pipe plugs can reduce resistance and allow easy, smooth movement of furniture without lifting, protect your floors and furniture while increasing flexibility in furniture movement. 【Prevent Scratches & Reduce Noise】: Putting these plastic dome plugs / chair feet covers on the chair feet, prevent floor scratches or chairs wear from furniture rubbing against the floor, prevent bumps and chair feet rusting, effective protection of floors and furniture. It can also reduce harsh noise and vibration caused by the movement of chairs, creating a comfortable and pleasant environment for you. 【Easy to Install & Washable】: Simply inserted into the tube or hammered gently with a rubber mallet, no need to paste, the plastic plugs will not fall off and is able for long-term use. Meanwhile, the durable material makes its load capacity is large that hard to crack and high water resistance, can be washable & reusable, easy to clean, just rinse it off with water and dry it for reuse, suitable for indoor / outdoor use. 【Package Content】: 4 Pieces Black Round Tube Plugs with Ball Tips. These spherical plastic end caps chair leg floor protectors can be applied to hardwood/ tile/ marble/ concrete/ carpet floors, fits many furniture legs: chairs, sofas, steel, tables, shelves, dressers, cabinets, doors, railings, machines, patio furniture replacement feet etc, also can be lined and sealed for steel pipes, aluminium pipes, plastic profiles, fence systems. ◆Specification: Product Name: Plastic Plugs Spherical Plastic End Caps Material: Plastic (Durable and Wear-Resistant) Shape: Hemispherical Size: 38mm Color: Black Package Content: 4pcs Spherical Plastic End Caps ◆Characteristic: 1.Prevent scratches, reduce noise, easy sliding, protect your furniture and floor; 2.Easy to install and clean, no adhesive is required and securely without falling off; ◆Note: These plastic plugs are measured according to the Outside Diameter of your chair legs, please measure the chair legs' size and choose the right size for your chair leg. ◆QUALITY GUARANTEE: If you have any questions during the purchase and the shipment, please contact us, we will try our best to assist for you.