These filter holders have bodies and perforated support screens of 304 SS with PTFE gaskets and silicone O-Rings. Autoclave with membrane in place. syringe holders have luer fittings. In-line holders have 1/4 inch NPT) and 1/4 inch NPT) ports. Supplied with 3/8 inch hose barb connectors and two perforated 304 SS support screens. Open holders without disconnecting lines.