Zhoushan Changjia Plastic machinery Co., LTD is a China shoe machine barrel screws manufacturers and extruder replacement parts factory, company located in the middle of Jintang Island of the city of Zhoushan. This Company's products are based upon high quality steel 38CrMoALA, which is conditioned, surface nitridized or coated with hard alloy and polished, showing very high precision, wear resistance and long service life, therefore, used by many famous brand molding machines at home and abroad. It is also able to customize specific Extruder replacement parts according to the users' requirements and serve its users with designing of sample preparation.