Flexible fittings: an ideal solution for applications, where adhesive bonding is impossible or undesired. Suitable for repeated use. The fittings adapt perfectly even if the pipe coupling is not square or straight. In the overview you will be able to see, what external sizes these fittings match: external pipe size and external size of the PVC fittings. Material: PVC elastomer. PVC elastomer features extremely high tensile and tear strength, is extremely flexible and not subject to ageing ("rubberising").