mixed cellulose esters (MCE), pore size 0.22 μm, filter diam. 47 mm, white gridded membranes for microbiological analysis: Pricing: HVWP047S6: PVDF, pore size 0.45 μm, filter diam. 47 mm, white plain sterile membranes for microbiological analysis: Pricing: RAWG047S6