autovial 12 syringeless filter, glass prefilter, PVDF, 0.45 μm, 1000/pk: WHAAV525UNAO: Whatman ® Autovials ™ syringeless filters filter capacity 12 mL, pore size 0.45 μm, Nylon membrane: WHAAV525UORG: Whatman ® Autovials ™ syringeless filters autovial 12 syringeless filter, glass prefilter, PTFE, 0.45 μm, 1000/pk: WHAGN203APEAQUSP