Acu-pulse HomeACU-TECH™ Concentric Long Spigot Reducer PE100 PN16 SDR11 Range of Sizes Available.25x20mm - 500x315mm Pressure Rating:SDR11 ( Products 3034-) Note: Non-standard reducers fabricated to order ACU-TECH™ Concentric Long Spigot Reducer PE100 PN16 SDR11Size in mmSelectPressure RatingPN16 - SDR11