These stainless steel protective sleeves fit 1/8inch cable in level wooden posts. The cable railing protector sleeves can keep the cables secure in place, prevent cables from wearing into the wooden posts, and maintain the tension of the cable guide over time, ensuring the and aesthetics of the wood posts. NOTE: DO NOT use for angle posts or metal posts!! The cable railing hardware is made of T316 Marine Grade Stainless Steel, which has excellent resistance to rust, and extreme weather, making it ideal for coastal, indoor and outdoor environments, ensuring long-lasting protection for your deck cable railing system. The cable railing protector is perfect for DIY your own deck cable railing projects, good for indoor or outdoor wood post applications, such as deck, balcony, staircase, baluster, courtyard, porch, handrail and other areas where stainless steel cable railing kits are needed. Suitable for 1/8 inch stainless steel wire rope. Overall Length of Sleeve=0.79 inch, Flange Diameter=0.51 inch, Required Hole Diameter=0.28 inch. The cable railing sleeves can cover ugly holes and create a clean look to enhance the overall visual appeal of your space. Deck wire railing kit is simple to install, just insert the protector sleeves into the holes in the wood posts. Colour:B: Black Material:Stainless steel Package Contents: 1 set x cable railing hardware 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.