This Autotop™ syringe filter, Grade GF/G+GD1, contains an extra layer of Whatman™ Multigrade glass microfiber. The housings of Autotop™ syringe filters have been designed to be compatible with Zymark systems such as Benchmate which are used for automatic sample preparation. Diameter: 24.2mm. Pore Size: 0.7µm. Length: 21.5mm. Temperature Range: 4 to 40°C. Whatman™ #: 6839-0100.