*This pneumatic dual cartridge applicator gun offers a powerful 490 lbs. of thrust at 100 psi with a 2.5” cylinder. * It easily switches from a 1:1 to 2:1 ratio in just seconds with convenient snap-on/snap-off push disks. *The patented cartridge stabilizing plate ensures secure placement of all cartridges. *The air dump valve instantly stops the flow, and reverse air with a quick disconnect nipple makes setup and cleanup a breeze. *Perfect for use with 200/220 mL cartridges.