Hello!
What is the difference between 9301-0895 (Nylon filter membrane, 47mm 100/pk) and 5191-4338 (Filter membrane, nylon 47 mm, pore size 0.45 µm, 100/pk) Nylon Filter Membranes and R000038114 (Filter, nylon 66, 47 mm disk, pore size 0.45 um, 100/pk)?