Reducers Click to View Item Description Symmetric size Case quantity Case weight Diameter Height Finish 400-OS Orifice Reduce 24mm 9,000 32 lbs. 0.740″ 0.590″ 0.090Orifice 400-NS Orifice Reducerw/Latch Ring 24mm 9,000 32 lbs. 0.735″ 0.590″ 0.090Orifice 400-IC Orifice Reducer,in cap(Push-Pull only) 24mm Installed Installed Internal Internal 0.060Orifice *Contact us to find out about the best venting options for your products.