Disposable, sterile filter funnels for microbiological analysis testing of water quality, food/beverages, raw material, sterility testing and finished product quality. Membranes meet US EPA certification requirements for water quality work. The upper section separates easily from lower section for easy access to the membrane. Six funnel adapters are included with each case. NE/0147-0045 features a grey, gridded membrane which turns black when wet, making it easier to detect and count growing colonies.