Fangrui Product Details [applications]this Black Stainless Steel Protector Sleeves For 1/8inch 5/32inch Or 3/16inch Cable Railing. And Used On Wood/composite Posts To Prevent The Cable From Wearing Into The Wood. For Planning Your Own Cable Railing Project, Good For Indoor Or Outdoor Applications. [material]black Cable Railing Protector Sleeve Is Made Of Stainless Steel T316 Marine Grade, High Tensile Strength And Anti-fatigue Strength Weatherproof. It Is - Which Makes Our Balustrade Hardware Suitable For Coastal Installations. Black Cable Railing System Requires Hardly Any Maintenance. [size]overall Length Of Sleeve = 0.8 Inch, Flange Diameter = 0.48 Inch, Required Hole Diameter = 0.258 Inch, Black Cable Railing Protector Sleeves Are Suitable For 1/8inch 5/32inch Or 3/16inch Cable Railing. []this High Quality Metal Is Built To Withstand Extreme Coastal And Environments. Choose Between Kits For Metal Post Or Kits For Wood Posts. Black Stainless Steel Protector Sleeve Is Easy To Install And Provides A Stylish And