... customized 3.Direct manufacturer Direct factory make Inflatable Air ShaftIntroduction: 1. The air shaft introducing foreign advanced production equipment and fabrication ... uniform expansion, thereby lock nitrogen-treated barrel, when unloading, press on deflated mouth to deflated, then nitrogen-treated barrel can be ... 74,Φ1183,common shaft:fromΦ30-Φ1000 Our Factory: OEM Air Shaft for slitting machine