Filter, PTFE with Polypropylene Backing, 0.5µm, 37 Back Catalog number: GF37050T Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended TE-28 Teflon Bag, Septum Valve (50L) Price on request 800320-1 Air Boss & Restrictor Kit, GilAir-3/GilAir-5 and B Price on request 910-0906-NO-R GilAir-Plus STP 5-Pump Starter Kit, No cord Price on request