These dry ice makers are deal for immediate freezing or field use. Makes approximately 1.7 lb of flake dry ice per bag. Just connect to standard CO2 cylinder equipped with syphon tube for liquid CO2, CGA 320 fitting and fiber washer provide a safe, leak-proof connection. Slide and secure collection bag over nozzle, and open valve. Collection bag is almost immediately filled with dry ice. Cloth collection bag measures approximately 14 mm diameter x 32 mm long.