The introduction of T316L Marine grade stainless steel deck rail protective cover, with its excellent corrosion resistance and hardness, redefines Marine safety standards. Compared to the T316 SS, the T316L stands out in acidic environments, ensuring that your deck railings are maintention-free and durable even in extreme coastal conditions. This is not just a set of protective cover, but also careful care for every voyage. Its simple and clean black appearance, cleverly covered with drill marks, adds a touch of elegant decoration to the deck. The elegant black finish complements the simple and natural style, making every voyage a pleasure for the eyes and the soul. Specially designed for the middle wood column protective sleeve, effectively resist friction and wear, maintain cable tension stability, reduce vibration, is the ideal companion for the wood column. Accurately matching 1/8 in., 5/32 in. and 3/16 in. cable rail systems, we provide detailed dimensional information (total length 13/16 in. , internal diameter 7/32 in., adapter bit diameter 6.5 mm) and calculation guidelines (number of casing required = 2 x number of intermediate posts x number of cables) to make installation a cinch. What's more, you'll get 100 pieces of high-quality black stainless steel protective cover with a complimentary drill bit to meet all your needs.