●Made of Rubber material, Non-toxic, Non-smell, Wear-resistant. ●Compatible with the lens diameter from 50mm to 64mm. ●Package includes: 1x lens tab (medium) ●Reduce the abrasion of your lens focusing ring, provide extra protection to your precious lens. ●This focus ring has finger grooves that make the lens focusing more accurate and stable.Lens tap has enough elasticity to mount focusing ring to your lens.