Epimed Epidural Flat Filters have a flat, transparent housing with male and female Luer lock connections, allowing for easy and secure attachment. It contains a 0.2 μm hydrophilic Supor® membrane with low protein-binding characteristics. The Supor® membrane is retentive of B. diminuta and meets USP 25-NF 20 requirements for a sterilizing grade filter (per ASTM F838-83: Standard Test Method for Determining Bacterial Retention of Membrane Filters Utilized for Liquid Filtration). Additionally, Epidural Flat Filters contain no external wetting agents or surfactants that may otherwise introduce unwanted extractables. Features: Luer Lock Connections, No External Agents.