Crafted by Italian company FPS Softair, the CNC POM X-Ring bearing piston head (XPPD) is reinforced with POM plastic and carefully machined using advanced CNC technology. Its sturdy design includes double-sealed bearings and 6 ventilation holes for optimal performance. The innovative X-RING gasket minimizes friction and improves sealing within the cylinder, while an additional two sealing gaskets provide extra reliability.