... Tubing Material:Plastic Thread:NU,EU,BC Dia:2-3/8",2-7/8",3-1/2",4-1/2" All Plastic Thread protector for Tubing ... Casing thread protector,all size ... :2-3/8",2-7/8",3-1/2",4-1/2" Plastic Thread protector for Tubing,NU Thread protector,EUThread protector,BC Thread protector All Plastic Thread ...