30/30 Type Piggyback Chamber: Designed for heavy-duty truck and trailer air brake systems, this chamber combines service and emergency functions in a compact piggyback design. 2.25" Standard Stroke Performance: Built with a reliable 2.25-inch stroke to deliver consistent braking power and response under demanding commercial vehicle applications. Durable Construction: Features a rugged steel housing and corrosion-resistant components to ensure extended service life and reliable performance on the road. Easy Compatibility: Round air inlet with 3/8"-18 NPT threads, chamber height 7.437", and standard mounting configuration ensures quick, secure fit with OEM brackets and lines. OEM Replacement Equivalent: Replaces Bendix, Haldex, Automann, Fleetrite, TRP, Paccar, and other OEM part numbers including 3030-PSK, 5007610, S-17214, and BXNT3030ELSKIT.