Tianjin Soright company can supply high quality thread protector, the thread include EUE, NUE REG and IF etc, and the specifications are 2-73/8”, 2-7/8”, 3-1/2, 4-1/2, 6-5/8, 7-5/8 etc. The materials of our company's thread protectors include plastic, steel-plastic and all-steel. As customers gradua