Sealed tandem 30/30 air brake chamber with 2.5" standard stroke; includes clevis and installation hardware for easy, complete Replacement. Replaces For OEM and aftermarket part numbers Bendix BW-NT3030STD78, MGM MA15431, Automann 179.SB3030S, Haldex 3030SB, Volvo 85103137, Freightliner ABPN42A43030C3D, Newstar S16987, and more. Heavy-duty round cast air port bosses with 3/8" NPT threads; corrosion-resistant black E-Coated steel housings; standard 13.5" push rod with 5/8"-18 thread. Durable 8620 steel construction, 10.312" chamber height, and 4.75" center-to-center mounting bolt spacing ensure reliable performance in demanding applications. Wide-style clamp bands simplify diaphragm Replacement; environmentally friendly design protects against carcinogens compared to zinc-plated alternatives. AIR BRAKE CHAMBER 30/30 - SEALED - 2.5" STROKE (ROUND CAST AIR PORT BOSSES)INTERCHANGES:REPLACES Automann: 179.SB3030SREPLACES Automann: 179.SB3030SXREPLACES Barksdale: 3030REPLACES Bendix: 3030-TSREPLACES Haldex: 3030SBREPLACES S&S Truck Parts: 3030TA2AREPLACES MGM Brakes: 3430051REPLACES Volvo Truck: 85103137REPLACES Freightliner: ABPN42A43030C3DREPLACES PAI: EM30300-01REPLACES Leland Brake & Wheel Parts: LT3030TREPLACES MGM Brakes: MA15431REPLACES S&S Truck Parts: S-16987REPLACES Paccar Parts: SB3030CCREPLACES OE Aftermarket: T3030CREPLACES Barksdale: WA3030WA3030T