Go-Cal Replacent Filter Back Catalog number: 811-9917-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 401205-R Adapter for 1-4” to 1-8” ID tubing Price on request 801863-171-2301 BDX II Starter Kit, 230V Price on request GF37050T Filter, PTFE with Polypropylene Backing, 0.5µm, 37 Price on request