A 0.2 micrometre luer lock<unk>  that is not a "wheel<unk> " type shape. A<unk>  (sometimes called a wheel<unk>  if it has a wheel-like shape) is a single-use<unk>  cartridge. It is attached to the end of a<unk>  for use.<unk> s may have Luer lock fittings, though not universally so. The use of a needle is optional; where desired it may be fitted to the end of the<unk> . A<unk>  generally consists of a plastic housing with a membrane that serves as a<unk> . The fluid to be purified may be cleaned by drawing it up the<unk>  through the<unk> , or by forcing the unfiltered fluid through the<unk> .
Syringe filter
Mechanical filter 
Slow sand filter
Flow diverter
Bicarbonate buffer system
Fibrin glue
Hemodialysis product
Catheter lock solution