... API 11B APROVAL MANUFACTUER(11B-0088) HAVE GOODS IN STOCK, FULL SIZE, SLIM HOLE, SM & T SUCKER ROD ... ;API 11B APROVAL MANUFACTUER(11B-0088)HAVE GOODS IN STOCK,FULL SIZE, SLIM HOLE, SM & T COMPANY PROFILE ... coupling, Sub OD coupling, with various spec. of Full size, Slim Hole, grand chamfer, Two-way camber, ... can trust in China. PRODUCT DETAILS 7/8"Full Size Spray Metal Sucker Rod Coupling Material: Alloy ...