These filter assemblies for FILTERWARE™ filtration system consist of an all-borosilicate glass funnel, fritted glass support base, aluminum clamp, and silicone stopper. Choose from 47mm or 90mm filter assembly sizes. Individual components are offered in various sizes for a customized unit. For use with BP-1827 filter flasks, sold separately. NOTE: Aluminum Clamps BP-1753-000, BP-1753-090, Support bases BP-1826-090 and Graduated Funnels BP-1751-000, BP-1751-090 are also components of BP-1825 FILTERWARE™ All-Glass Filtration Apparatus.