This machine is 3 layer Co-extrusion Film Blowing Machine. This is an 3 layer Co-extrusion Film Blowing Machine, with high output, stable performance.Feature: 1, Joint ... rotate and rolling up of film are even and smooth. 3, Change of package, applying to blow film with different specifications. 4, ... are subject to change withourt prior notice. SJ3 Series 3 layer Co-extrusion Film Blowing machine