The Frigimat® Dry Ice Maker eliminates the need to buy large quantities of dry ice when only a little is needed. It employs the Joule-Thomson effect to produce a solid 454gm (16 oz) block of dry ice in one to two minutes. A brass relief valve safely vents excess gas. Removing the dry ice block requires just 30 seconds. Each chamber of liquid CO2 will make 8 or 9 blocks of dry ice, each measuring 8.5cm (3-3/8") x 11cm (4-3/8") long. Made of epoxy-coated steel with an aluminum ice chamber and brass valves with four non-skid rubber feet. Dimensions are 30x17x13cm (12"x 6-1/2"x 5") high. Shipping weight 5.5kg (12 lbs). Includes a 1.8m (6 ft) nickel plated copper connecting tube with standard GCA 320 (.830"-14) thread couplings for easy attachment to a LCO2 cylinder.