Compressed air hose is made of reinforced synthetic rubber to assure long life and protection against ozone, weathering, and temperatures up to 158°F (70°C). Includes a 1/4 NPT male brass fitting on each end and is 3/8" inside diameter. Hose lengths are 10', 20', 30', 40' and 50'. Indicate the length with a dash. Example: A Model 900061-30 is 3/8" ID Hose x 30' long.