Impression Material Dispensing Gun A single dispenser for 50ml and 25ml cartridges. Complete kit comprising gun, 2 cartridge holders and 3 plunger racks to accept: Old style cartridge with single flange 1:1 ratio. New style cartridges with reinforced flange 1:1/2:1, 4:1 and 10:1 ratios. Ergonomic handle and trigger mechanism. Autoclavable.