The McAlpine White Plastic Flange & Dip Tube (ST90WHTOP+TUBE) is a replacement part designed for use with McAlpine shower traps. It includes a white plastic flange and dip tube, which are used to connect the shower trap to the waste outlet. The flange is designed to fit snugly onto the trap, providing a secure connection to the dip tube. The dip tube extends downwards from the flange, directing waste water into the trap and preventing it from flowing back into the shower tray. Overall, the McAlpine White Plastic Flange & Dip Tube is a reliable and easy-to-install replacement part for McAlpine shower traps. Its white finish gives it a clean and polished look, which is suitable for modern bathrooms.