Cover Cap Best Fittings for 1/8" BSP & M10x1 Fill Valve

 This Best Fittings 1/8” BSP & M10x1 fill valve cover cap is made of black Delrin, which makes it incredibly wear-resistant. The cover cap by Best Fittings is compatible with a 1/8” BSP and an M10x1 fill valve and it will only cover the valve itself. It will keep that part safe from harm, ensuring the valve on your rifle will remain undamaged.