04-01,2021 Henglong screw
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Double alloy barrel

The parent material is made of famous brand and high quality 40Cr. The inner wall casting adopts high-quality alloy powder and other rare elements. It also improves the equipment and technology greatly, which makes the products have higher toughness and better wear resistance and corrosion resistance in the same industry. Alloy thickness is more than 1.5mm, hardness hrc58-hrc64