... 2.air ring:double-outlet 3.thickness:0.08-0.12mm 4.coiling form:two position Structural characteristics of multilayer machine unit ... neckling die1,4001,6001,8002,0002,2002,400Outer dia. of air ring3,6003,600Double tuyeresDouble tuyeresDouble tuyeresDouble tuyeresHaul-off height19,00021 ... ×2520×13×2520×15×2722×22×33 Plastic Equipment: Multi-layer co-extruding PE greenhouse film Machine