Fits plastic or glass media bottles with 45mm neck sizes. Nylon (NY) membranes are naturally hydrophilic, surfactant-free and offer the lowest extractables. Angled hose connector simplifies vacuum line attachment. Individually packaged, sterile and nonpyrogenic. Each system has the membrane material and pore size printed on the unit and is color-coded by membrane type for easy product identification. Expiration date appears on the filter funnel and shipping boxes. Expiration date of the membrane is three years from the time the product is manufactured.