Reducer bushing are fittings in schedule 40 PVC (polyvinyl chloride). PVC schedule 40 fitting conforming to ASTM D 2466. PVC fittings never rust, scale, or pit, and will provide many years of maintenance-free service and extended system life. Most common fitting for irrigation lawn sprinkler systems. Replacement for model Dura 437-337, Ewing 04437-337, Lasco 437-337, Spears 437-337. Available in white color. Measures 3-inch spigot by 1-1/2-inch socket. Includes 10 reducer bushing per pack.