EZwaste Solvent Waste filter replacements come in a pack of 1, 2, or 5. The Replacement Chemical Exhaust Filter EZwaste Solvent Waste System is designed to be an affordable solution for HPLC liquid waste disposal. Each system is manufactured to safely collect waste from two HPLC machines. This system features an activated carbon filter which traps volatile organic compounds from being released into the air. This prevents chemicals from being inhaled by lab workers and provides an easy mechanism of disposal for vapor wastes. The EZwaste Solvent Waste system also features a closed loop design which protects against leaks and spills, improving overall lab safety.. Filter length: 6.97". Filter base diameter: 1.89". Filter top diameter: 1.70". . . Thomas 330-0906-TMS EZwaste Safety Vent Chemical Exhaust Filter, 6.97" Length. Country of Origin : United States. Part Number : 1171W30EA. Pack of : 1.