This 47mm in-line holder (model KS47) is available in both type 304 or 316 stainless steel. The PTFE coated support screen prevents sticking of the membrane during autoclaving. The back-pressure support screen protects the filter from rupture during reverse pressure surges. Upstream vent enables venting at any time during filtration. Dual sealing system compresses filter to ensure no lateral wicking/leaking.