Upper part made of PP, high impact PS collar. CN membrane. Low-cost disposable, sterile filter funnels for microbiological analysis testing, food / beverages, raw material, sterility testing and finished product quality. Membranes meet U.S. Environmental Protection Agency (EPA) certification requirements for water quality work. Upper part separates easily from lower for easy access to the membrane. - Designed for single use only. - Acc. to ISO 7704. - Sterile. - With graduation. Upper part made of PP, high impact PS collar. CN membrane. Low-cost disposable, sterile filter funnels for microbiological analysis testing, food / beverages, raw material, sterility testing and finished product quality. Membranes meet U.S. Environmental Protection Agency (EPA) certification requirements for water quality work. Upper part separates easily from lower for easy access to the membrane. - Designed for single use only. - Acc. to ISO 7704. - Sterile. - With graduation.