IDEX practical Replacement Back Pressure Regulator (BPR) Cartridge operates as an easy to use, replaceable component for IDEX BPR systems. IDEX cartridge can easily be used with any of IDEX standard BRP Holders and creates a back pressure of 250 psi (17 bar). It is constructed from PEEK, Tefzel (EFTE), and has a gold plated stainless steel spring delivering reliable usage. It comes with a tan body and white cap.