[Compatibility]: Compatible with D R10000 series shower valve. Used to firmly fix the ink cartridge to the valve. .[Material]: Made of high-quality metal with brass structure. Sturdy and . It has clear and clean threads that can be used for a long time. .[Note Before Use]: Clean the threads on the valve body (you can use a wire brush) and wipe off the dust and particles on the bonnet nut before installation. To prevent the bonnet nut from being difficult to turn or unable to be tightened. Usually, the clean nut is easier to turn. .[Function]: The bonnet nut is an important part of the shower faucet and bathtub, which is used to fix the ink cartridge to the valve. To ensure your seal kit is installed correctly on the valve body, it is to check the seal and replace the bonnet nut when replacing the cartridge. .[Package]: 1PC Bonnet Nut Replacement for RP22734.-----One Year Warranty Service. If you have any issues with the product, please feel to us, we will respond as soon as possible.