This product is made to be installed with 43mm (known as 1 1/2 inch solvent weld) and 36mm (known as 1 1/4 inch solvent weld) pipe or fittings. If your pipe or existing fittings measure 40mm and 32mm then this product is not compatible and you will require 40mm and 32mm pushfit or compression fittings. This listing is for a Pack of 1 Solvent weld reducer designed to fit into a larger solvent weld fitting (they cannot be inserted directly into a pipe) and then accept a smaller solvent weld pipe. Solvent weld fittings are secured using solvent weld cement for a permanent and strong installation. Manufactured from ABS and is a light in weight yet strong and a cost effective option.