1.plastic,new materail, 2.with lighter weight and lower transport costs 3.The quality of goods is ensured. 1.All plastic thread protector with lighter weight,lower transport costs,Completely recyclable-no plastic/metal separation required,no disposal to landfill.CNC cut thread for exacting fit.2.Hot-stamped-permanent ID for thread type/part number,no stick-on lables.Close-end recessed liftable ...