13mm, Syringe filters with 0.45 um Nylon and 1 um GF pre-filter per 100

13mm, Syringe filters with 0.45 um PTFE and 1um GF pre-filter per 100

13 mm Syringe filters with 0.45 um Nylon and 1 um Polypropylene pre-filter per 100

25mm, Syringe filters with 0.45 um PTFE and 1 um GF pre-filter per 100 # SF25-GF-PT-45

33 mm Syringe filters with 0.45 um Nylon and 1um Polypropylene pre-filter (very popular) per 100