The hoses are made of a suitable rubber specially compounded for attaining high durability. There is no elongation or expansion of the outer diameter when pressure is exerted on the inside of the hose. Stainless wires (two spiral wires) are incorporated for discharging any static electricity. They are lightweight and have excellent flexibility. Hoses are available from a variety of manufacturers internationally. Hoses from a few of the major manufacturers are listed below as a reference. When ordering, select a representative code for the size of the hose required and specify the name of the manufacturer from whom you wish to order.