Begadi Precizní CNC hlava pístnice GBB 13,5mmCNC machined aluminum piston head with ventilation.Fits GBBs with a nozzle diameter from 13.60 to 13.90mm.Outer diameter: 13.5mmHeight: 4.5mmIndentation: (rear): 4.5mm x 1.5mmO-ring: 9.5x2mm (13.5mm outer diameter), expands by ventilation up to 13.90mmThread: (screw) M3
