blow molding machine : 1.volume :under 2Liter 2.material :HDPE ,PP ,PE ,PVC ... .double layer material 4.single station plastic product making machinery /blow moulding machine :according to different volume of your bottle ,select different ... or with double-bag and through screw feed etc ,which can meet for kinds of productions or bottles .c.screw system :barrel& screw :38CrMoAlA d.motor ...