Improved filter support provides faster flow rates Easy-to-read molded graduation marks on bottle top filter Curved bottle design for easy handling Larger membrane diameter for 250 & 500mL filters increases flow and reduces clogs for faster filtration 90mm diameter of 500mL membrane has 44% more filtration area than standard 75mm - Larger area, same price Angled hose barb adapter fits three size hose diameters and prevents the filter from tipping Printed lot number and expiration date on every bottle top Bold easy-to-read printed membrane and pore size for easy identification Polyethersulfone (PES) membrane is useful for high flow and low binding Nylon (PA) membrane has excellent chemical compatibility and does not require pre-wetting 0.22μm PES membrane is the first choice for sterile filtration of cell culture media 0.10μm PES membrane ideal for mycoplasma removal 0.45μm PES membrane ideal for solution clarification