Made of strong and rigid PVC, completes header pipes weigh one fourth of steel pipes of similar size and specifications. These pipes are available in 20 feet (6mts) lengths and in diameters ranging from 4" (100mm) through 10" (250mm). Being of light plastic, these are easily carried by hand. Outlets with saddles are spaced at 7 per 20' (6m) or 14 per 20' (6m) as per requirement. Unused saddles are easily capped with plastic plugs.