Description: Camera lens adapter converter ring. Compatibility: for Tamron adaptall II lenses to Canon EOS camera. Delicate workmanship, tightly coupled with the bayonet. Made of metal, durable in use. Greatly increased the lens resources, brings you a lot of shooting fun. Specification: Material: Metal Diameter: 64mm/2.52inch Height: 15mm/0.59inch Packaging Material: Paper Box Package Includes: 1 Piece Lens Mount Adapter Ring Note: Please allow a slightly errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understanding and attention