• Helps you fix and balance a long or heavy lens that is attached to the camera front
• Perfectly fits the Canon EF 70-300mm f/4-5.6L IS USM， Canon EF 28-300 mm f/3.5-5.6 L IS USM lens and has the same construction
• A great accessory for photographers
• Made of high quality metal
• Ring Diameter: 82 mm
• Ring Thickness: 5-7 mm
• The UNC (Unified National Coarse Thread) is 1/4

Package Details Weight: 186.18 g
Size: 11.5*9*6.5 cm