1Application: Oil filler bleed tube kit is professionally manufactured, perfectly fits for Seastar inboard, outboard hydraulic steering system. 2High Efficiency: Used to replenish oil to the steering system. Let professional ship repairers save more time in the process of oil change, professional and efficient. 3Leak Free: Threaded brass fittings ensure no leaks in your hydraulic steering kit, keeping the entire steering system sealed. 4Premium Material: All metals in the bleed kit are brass and stainless steel to prevent rust. This ensures high durability even in marine applications. 5Easy to Use: Quick connect fittings eliminate the need to screw in two threaded ends in different directions, making bleed your hydraulic system an easy task.