Sartorius Minisart™ Plus Syringe Filters are single-use, complete filtration units with a surfactant-free cellulose acetate membrane. Choose from three color-coded pore sizes in sterile or non-sterile options. X500 Minisart NMLPlus (GF+SFCA) 1.2um 28mm, non-sterile, MBS, Male Luer Lock, Red. Pricing and Availability.