These quality stainless steel holders are designed for filtering small batches of liquid without having to use a separate pressure vessel. There are separate ports for pressurizing the reservoir and for adding additional sample. Available in either type 304 or 316 stainless steel. A silicone o-ring seals the membrane internally by hand-tightening locking wing nuts. Model KST47 has a photoetched 304ss screen. Inlet is 1/4"NPTM to 11mm hose barb. Outlet is 1/4"NPTM to 10mm hose barb adaptor; Models KST90/142 has a PTFE coated support screen. Inlet is 1/4"NPTM to ball valve with 7-13mm stepped hose barb adaptor. Outlet is 3/4"NPTM to 11mm hose barb. Replacement parts and alternate o-ring materials are available. KST293 models are also available. Assemblies can be PTFE coated by special order.