Our practical Replacement Back Pressure Regulator (BPR) Cartridge operates as an easy to use, replaceable component for our BPR systems. It is constructed from PEEK, Tefzel (EFTE), PCTFE and has a gold plated stainless steel spring delivering reliable usage. Our cartridge can conveniently be used with any of our standard BRP Holders and creates a back pressure of 40 psi (2.8 bar). It comes with a tan body and a blue cap.