Outfit your vehicle to be Ready for the Road Ahead™ with a secure cap to lock hydraulic fluids in place, with the Buyers Replacement Carbon Steel Twist-On Cap with Chain. Thanks to its tight-fitting seal and loose chain, this replacement cap is the ideal choice to keep water, oil, grime, and other contaminants from entering the valve and reservoir tank. Crafted with a reflective metallic surface and 'hydraulic fluid only' label to prevent the addition of incorrect fluids. FleetPride is your First Click in Heavy Duty®.