... specification of 3/4"to7/8"sub sucker rod coupling Weight:0.92kg O.D.:1-13 ... 13)Usage: oil exploration equipment, accessories, oil sucker rod couplingOthers : Payment terms and price can be charged ... T sucker rod coupling, Class SM sucker rod coupling, Full size sucker rod coupling, slim hole sucker rod coupling,all ... you are interested in any of our sucker rod couplings or have any request, pls feel free ...