Autofil 1151-RLS Polystyrene Sterile Filter Funnel, PES Membrane, 250ml Volume, 0.22µm Pore Size, 66mm Filter Diameter (Case of 12)

I remember in the lab, every time we wanted to filter something, we had to clean the filter, cut the membrane to the size of the filter, then filter the solution. During the filtration process, you'd have to hold the filter until it is completed. With these Autofil, I can just open the bag, place it on the stand that they sell, pour the solution then walk away. Saves so much time. Thank you.