Evolution Aqua Flexible pond fittings are a perfect solution for all your pond equipment needs. The rubber fittings, known as "Boots", are made of strong and durable rubber that has been designed to fit easily onto various types of pipe from PVC to lead, Copper to clay. Each fitting has an easy to adjust jubilee clip on each end, making connection simple and gives a perfect seal with no need for gluing. The fittings can then be removed and reused over and over again and can be adapted to any pond system set up. The Straight coupling allows for a simple join of 2 pieces of pipework, leaving a water tight connection in the tubing.