The Puradisc syringe filters are produced from pigment-free polycarbonate construction with standard inlet/outlet (Female Luer Lock/Male Luer) connections. Male Luer Lock outlets are also available. Options include a sterile, medical-grade blister pack for critical applications. A wide range of membrane types are also available to suit your particular filtration needs. Whatman™ Whatman™ Puradisc™ Aqua 30 syringe filters have a 30mm diameter with a larger filtration area which is 44% greater in comparison to 25mm syringe filters. These syringe filters are designed specifically designed for filtration of environmental samples prior to COD and DOC analysis. The membranes used in these syringe filters are prewashed prior to assembly so as to reduce the organic carbon level. Diameter: 30mm. Pore Size: 0.45¬µm. Membrane Type: Cellulose Acetate (Non-Sterile) Color Code: White. Inlet/Outlet: Female Luer Lock/Male Luer.