It effectively covers unsightly holes in the wire rope and prevents water from penetrating, resulting in a clean and smooth overall appearance. Additionally, deck cable railing hardware prevents wear and tear caused by wire rope vibration. Wheel Cable Railing Kit Protective Cover is only suitable for metal posts with thickness Less than 1.5mm (0.06Inch) and hole diameter = 10.5mm (0.6Inch). Cable railing system outer ring diameter: 17mm (0.7 inches) rear wheel diameter: 10.5mm (0.6 inches) Made of stainless steel deck protector made of T316 stainless steel, waterproof, rust-proof and corrosion-proof. Suitable for areas and environments with elements. [Suitable for 1 or 8-inch Stainless Steel Wire Rope] 1 or 8-inch stainless steel protective sleeve is suitable for 1 or 8-inch diameter steel cables on horizontal metal posts. 1 or 8-inch grade wheel protectors are designed for straight-line operation. This deck cable railing hardware's 1 or 8Inch protective cover can withstand over 200 pounds of load, increasing the tension and load-bearing capacity of your steel cables Colour:Black Material:Stainless steel Size:1 or 8Inch Package Contents: 20 x Cable Railing Kit Protective Cover Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.