Universal Cable Compatibility: These Cable Railing Rubber Grommets are engineered for 1/8", 5/32", and 3/16" stainless steel wire rope cables. The versatile design accommodates multiple cable sizes, making them suitable for various residential and commercial railing installations across different project requirements Advanced Post Protection System: Cable Railing Rubber Grommets effectively cover holes in metal posts to prevent moisture infiltration that causes corrosion and rust. The grommets eliminate direct contact between dissimilar metals, reducing electrolysis and preventing cable wear against metal or composite posts for enhanced system longevity Weather-Resistant Rubber Material: Manufactured from premium rubber with superior corrosion and weather resistance properties. These Cable Railing Rubber Grommets maintain structural integrity and sealing performance across various environmental conditions, ensuring reliable long-term protection for outdoor railing systems Precision-Engineered Dimensions: Features flange diameter of 21/32" and sleeve length of 13/32", designed to fit metal post hole sizes ranging from 13/32" to 15/32". The precise specifications ensure proper fit and effective sealing for standard cable railing post configurations and installations Simple Tool-Free Installation: Cable Railing Rubber Grommets install easily without specialized tools or complex procedures