in practical applications, the air shaft is convenient to operate, quickly, no damage for ... the life-span is longer.3.When using, match with our company’s professional configuration of the aerate gun ... filling gas for the nozzle jet, to make the shaft of off-axle apperance uniform expansion, thereby lock nitrogen ... Ø126mm6 "Ø150mmØ155 – Ø158mm8 "Ø200mmØ205 – Ø208mm machine parts key type air shaft