Ideal for use when savings in media or incubator space are required. 55mm dish accommodates 47mm membrane filters making it suitable for water testing. 50mm deep form dish (product code 124) is over 20mm deep and designed for use with liquid media. Aseptically manufactured under clean room conditions (Class 7 ISO14644) to exclude microbiological contamination. Sterility: (AS) Aseptic Manufacture.