Properties 昍esistant to abrasion, corrosion and heat, anti-magnetism 旽igh toughness, strength and hardness and anti-pull-off 昇on-contamination and environment-friendly 昄ess prone to damage and aging compared to plungers made of traditional materials Applications Widely used in rigid work conditions, ideal substitutes for steel alloy, hard alloy and other metals. Uses structural ceramic for the working and contract surface with media and the plungers are connected with metal handles mechanically, with the viscose glue filled between them to prevent the screw from getting loose.