The 316 Stainless Steel Bullet Cap fits 1" lifeline stanchion tubes and gives your railing system a clean, finished look. The 316 stainless steel helps fight rust and holds up well in marine and outdoor conditions. This bullet cap works well on sailboat and powerboat railings. It helps cover exposed tube ends and improves the look of your lifeline system. Use it for new installs, upgrades, or replacement jobs.