PURPOSE: These cable railing protection plugs are designed for use with 1/8", 5/32" and 3/16" stainless steel wire rope cable. Used to cover holes in metal posts to prevent corrosion and rust inside the railing posts. MATERIAL: Made of high quality rubber, corrosion and weather resistant to ensure long lasting performance. SIZE: Cable railing kit is compatible with 1/8" 5/32" 3/16" cable railing posts. Flange diameter: 21/32", sleeve length: 13/32". Metal post hole size range: 13/32" to 15/32". EASY INSTALLATION: Can be easily installed without cumbersome steps and tools, thereby saving installation costs. Premium After-Sales Service: We offer a 24-month warranty to ensure the best service for you. If you encounter any issues, damages, or find the product unsuitable, We provide comprehensive after-sales support and will strive to resolve your concerns promptly. Designed to cover the holes in the metal posts to prevent corrosion and rust inside the posts, these cable railing protection plugs are designed with an invisible opening for easy, cost-saving installation without the need for tedious steps and tools for 1/8", 5/32" and 3/16" stainless steel steel wire rope cable.