Usage Tips:Specifications - Pore Size: 0.22 , Pack of 100, Non Sterile. Evey laboratory filters are labeled with membrane and pore size for easy identification. APPLICATIONS - PTFE syringe filters can be used in liquid culture caps to exchange air for mushroom growth cultures, cultures and grain spawn cultures. Hydrophobic PTFE Membrane - The hydrophobic PTFE membrane of this PTFE syringe filter has broad chemical compatibility and strong chemical stability for venting applications and leachable non-clarification required for liquids. Connectors - This non-sterile syringe filter comes with two connectors: female luer lock connector inlet and male luer connector outlet for better syringe filtration. Features - This laboratory syringe filter offers high throughput with strong acids and bases, low protein binding and high temperature resistance, which can fully meet all your syringe filtration needs. size: 25mm Material: PTFE colour: red Package Contents: 100 x syringe filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.