Applications Pneumatic gun for 375, 450 and 600ml two-component cartridges with 4:1, 2:1, 1:1 ratio Characteristics 375, 450 and 600ml cartridge with 4:1, 2:1, 1:1 ratio Properties PPA 300A is a PC COX SULZER pneumatic gun. PPA 300A is a pneumatic applicator for 375, 450 and 600ml cartridges. PPA 300A is ergonomic, very robust and easy to use. Other pneumatic guns from PC COX SULZER are available for products requiring different mixing ratios.