PP housing, autoclavable. With a prefiltration stack of Whatman GMF 150 (graded density) and GF/F glass microfibre media, GD/X syringe filters can process 3 to 7 times more sample volume than unprotected membranes. GD/X syringe filters are ideal for heavily particulate-laden samples found in: - Dissolution testing. - Content uniformity. - Concentration analysis. - Routine sample preparation. - Food analysis. - Environmental samples. - Composite assay. PP housing, autoclavable. With a prefiltration stack of Whatman GMF 150 (graded density) and GF/F glass microfibre media, GD/X syringe filters can process 3 to 7 times more sample volume than unprotected membranes. GD/X syringe filters are ideal for heavily particulate-laden samples found in: - Dissolution testing. - Content uniformity. - Concentration analysis. - Routine sample preparation. - Food analysis. - Environmental samples. - Composite assay.