Planet screw specialized in: 1. Rigid PVC products: Plastic sheet, PVC medical sheet, PVC card substrate, PVC poker card material, PVC watches sheet, colored PVC sheet 2. Semi rigid PVC products: Semi rigid PVC adhesive tape, printing cloth, advertising materials, light box cloth, decorative materials(film) 3. Soft PVC products: Soft PVC tape, all kinds of inflatable toys, raincoats, plastic film materials, salt film, home textile packaging. ZY produces planetary screw and barrel in full specifications, pls find detailed info as below: Base Materials: (1)38CrMoAlA(JIS SACM645) (2)42CrMo(AISI 4140) Technics: Heat treatment Nitriding treatment Technical parameter: Nitrided layer depth: 04-0.6mm Nitrided hardness: 850-950HV Nitrided brittleness: Less than grade 1 Surface roughness: Ra0.4 Linearity of screw: 0.015mm Terms and conditions: Production time: 35 days Packing: Export standard wooden case Trade terms: FOB, CNF, CIF, etc…