All products will be made according to API and related international standard as per customers' requirements. Casing quick-operating thread protector is one kind of manual device for protecting casing outside thread. The structure is simple, solid durable, reliable performance. Adopting for our casing quick-operating thread protectors could save time and cost. Type O.Dmm(inch) Connection Lengthmm(inch) KHS 5 230(9-1/16) BCSG,LCSG 125(4-15/16) KHS 5-1/2 235(9-1/4) BCSG,LCSG 125(4-15/16) KHS 7 275(10-13/16) BCSG,LCSG 125(4-15/16) KHS 9-5/8 335(13-3/16) BCSG,LCSG 145(5-45/64) KHS 10-3/4 362(14-1/4) BCSG,?CSG 115(4-9/16) KHS 13-3/8 425(16-47/64) BCSG,?CSG 115(4-9/16) KHS 16 500(19-11/16) BCSG,CSG 125(4-15/16) KHS 18-5/8 565(22-1/4) BCSG,CSG 125(4-15/16) KHS 20 610(24) BCSG,?LCSG 145(5-45/64)