Type of connector:19,22,25mm rod conne Max O.D.:58,58,72mm Total length ... 348,370mm Purpose:It is mainly used to right the rod in side-wearing well, especially in above-neutral point ... so on.Traits:Simple structure, convenient usage, long time of service life, relative lower cost and so on.When dropping ... avoid scratching the surface on the joint between the rod and the well mouth. SUCKER ROD PUP JOINT