Size: Inner diameter 30mm 1. Our flexible end caps work perfectly to avoid scratches on the kitchen or on the parquet, as flexible protective seals for metal chair tips, patio furniture, beer legs, table legs, stools, screw heads or nails, or to cover any post or round holes. 2. The wire cover is made of vinyl rubber, flexible and insulated. Furniture, electricity, and so on. The material is high quality and durable, has a long service life. 4. Perfect for covering screws or other threaded parts. Specifications: Inner diameter: 30mm Color: Black Material: Rubber Package Included: 10 x Screw Covers