Feature: 1. It is made of aluminum alloy material, and the surface is treated with black oxidation and anti reflection treatment, which has higher strength and durability. 2. All metal and high quality compression spring screws and double non slip engraved design greatly increase friction, and it is effortless to screw it by hand. 3. The graduation mark is convenient for the use of the gradient lens, and three square filters can be installed quickly. 4. A round polarizer filter can be superimposed in front of the lens to be used together with a square filter, and there is no vignetting when superimposing use. 5. With wide compatibility, it is compatible with adapters with 67mm 72mm 77mm 82mm 86mm diameter. Specification: Item Type: Filter Holder Material: Aluminum Alloy + Plastic Product Color: As Pictures Shown Product Weight: Approx. 108g / 3.8oz Scope of Application on the Reverse Side of the Filter Holder: For 67mm 72mm 77mm 82mm 86mm diameter filter adapter ring Scope of Application on the Front of the Filter Holder: For 100mm square filter. Package List: 1 x Filter Holder