The Whatman GD/X sterile, Polyvinylidene Difluoride (PVDF) membrane syringe filters are designed to enable the filtration of viscous, hard-to-filter samples greater than 10 mL. Each unit contains a prefiltration stack of Whatman multigrade glass microfiber (GMF) and Glass fiber (GF/F) filters. The combination of this pre-filtration stack and filter housing design enables you to filter highly particular loaded samples.

• Reduces need for multiple syringe filters by processing three to seven times more sample volume than syringe filters without prefilters
• Female luer lock for leak-free connections
• High-efficiency Whatman GMF 150 and GF/F pre-filter media
• Eliminates or greatly reduces the need to carry out separate prefiltration step for difficult-to-filter samples