1.casing bushing 2.type:CU CUL CB 3.API Spec 7K ISO9001:2008 4.GB ... 28001-2001 5.GB/T 24001-2004-ISO14001:2004 Type CU,CUL,CB etc.casing bushings and insert bowls can handle ... from 9 5/8 to 30 inch O.D. Type CU and CUL are solid bushing; Type CB are split bushings ... Insert Bowl1627Body20Body24Body26Body30Company Qualifications: Production Equipment:Testing Equipment: Casing Bushing CU CUL CB