WENGS HUAJIAN COLTD

Adding air pvc tee through the fill valve moves the piston forward, allowing air to leak into the reservoir. The air supply is then disconnected, and the trigger released causing the piston to move backward. This releases all the air in the reservoir into the barrel instantaneously, resulting in faster ping pong WENG'S HUAJIAN CO.,LTD balls and potatoes. [Detailed introduction]