Graco Probler 2 (P2) Spray GunPlural Component Air Purge Gun for High Output Spray Polyurethane Foam and Polyurea Applications The Probler P2 Gun is lightweight and easy to maneuver, even in difficult spraying positions. Its double piston design provides more than 300 pounds (136 kg) of triggering force, much more than a smaller piston diameter. The Probler P2 reduces maintenance, increases spraying up time and is easy to use. FEATURES Easy daily maintenance Responsive trigger