These 5 way PVC pipe fittings are commonly used to make center supports when covering a large areas with a PVC structure. It is also useful to make bases for sprinklers, dog agility equipment and other stands. All five outlets are non-threaded sockets and are compatible with furniture grade PVC pipe or standard PVC pipe from a hardware store. The Furniture Grade fittings have a smooth glossy finish and are non-marked ready for your project. The sizing of these correspond to schedule 40 PVC pipe.