... made from carbon steel.We supply PHS series including:POS 5, POS 6, POS8, ... ,POS28,POS30PHSA series products datasheet: Related products series including:,PHSA,POSA,PHSA Series;PHS Series; Who we ... are?We are Zhe Jiang Sinier Guide Co., Ltd, we produce cold rolled ball screw ... We are experienced factory for cold rolled ball screw, linear guideway, bearings since 1997. Registered ...