①Drake Petro can supply sucker rod couplings,polished rod couplings and sub-couplings.
②Standard:API 11B
③Full size coupling:
Grade：T,SM
Size：5/8″ , 3/4″ , 7/8″, 1″ , 1-1/8″
④Slim hole coupling:
Grade：T,SM
Size：5/8″ , 3/4″ , 7/8″, 1″
All products implement industry standards, providing customers with high-quality products, solutions and technical services.
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