... Custom Made)Application: For Plastic Mold partsDescription:1. Made from high quality and long lasting hardened steel guide bushings.2. Great hardness ... post, Guide bushing, Guide Pillar, Leader Pin, Guide post sets, Ball retainer, Punch, Button dies, Non-standard mould inserts, Springs, ... , please feel free to contact us. High quality hardened steel ball bearing straight guide bushing with oil groove