The McAlpine Chrome Plated Brass Flange & Dip Tube (ST90CBTOP+TUBE) is a specific plumbing fitting used in conjunction with a shower trap. The flange and dip tube are designed to be installed in the shower tray or bath to provide a neat and tidy finish to the plumbing installation. The ST90CBTOP+TUBE features a chrome-plated brass flange, which sits flush with the surface of the shower tray or bath. The flange has a 90mm diameter and is designed to be used with a McAlpine shower trap. The dip tube, which is also included with the ST90CBTOP+TUBE, is made from high-quality materials and is designed to fit into the shower trap. It is designed to prevent water from flowing back into the trap and causing foul odours. Overall, the McAlpine Chrome Plated Brass Flange & Dip Tube (ST90CBTOP+TUBE) is a specific plumbing fitting used in conjunction with a shower trap to provide a neat and tidy finish to the plumbing installation. Its high-quality materials and chrome-plated finish make it a durable and stylish option for many plumbing applications.