feet in length and on the average from one to two of the sucker guides 10 are mounted on each of the sucker rod sections the rod guides reciprocate with the sucker rod keeping the sucker rod in a central position within the tubing string as the sucker rod and guides reciprocate to produce well fluids through the tubing string the well fluids flow around and through the slots in the rod guides as well fluids are lifted to the surface around the sucker rod in the production tubing wall referring to the drawings the rod guide 10 is an integral cylindrical member formed of an elastic relatively hard material having low drag or friction characteristics such as nylon the rod guide has a cylindrical outer wall surface 13 beveled at end surfaces 14 and 15 the beveled surface 14 slopes inwardly from the cylindrical surface 13 to a flat end edge 20 similiarly the beveled surface 15 slopes inwardly from the cylindrical surface 13 to an opposite end edge surface 21 the rod guide has a plurality of circumferentially spaced longitudinal ribs 22 extending the length of the guide between the beveled end surfaces 14 and 15 the ribs 22 provide a thickened body wall along lines of maximum stress as discussed hereinafter and also provide longitudinal bearing surfaces which engage the inner wall of the production tubing 12 as the rod guides and sucker rod.