Alum Tripod Collar Mount Ring 81mm for Canon EF 28-300mm f/3.5-5.6L IS USM Lens
Aluminum Alloy Tripod Collar Mount Ring C(WII) for For Canon EF 70-300mm f/4-5.6L IS USM / For Canon EF 28-300mm f/3.5-5.6L IS USM Lens. For Canon EF 70-300mm f/4-5.6L IS USM. For Canon EF 28-300mm f/3.5-5.6L IS USM.