API 7/8*2 7/8 sucker rod Roller Guide/centralizer

2021 API sucker rod  Roller  Guide/centralizer with factory price  1. Roller Centralizer should be installed:   1) On the first two or three rods above the bottom hole pump.    2) Intermittently throughout the rod string where wear is indicated on rods or tubing.    3) Where known hole deviation occurs.    4) On the first two or three rods below the stuffing box.   2. Tech Parameter   Specification DIMENSIONS(INCH) Diameter Length Length of the groove 5/8''ROD/2-3/8''TUBING 1.50 27 1.80 3/4''ROD/2-3/8''TUBING 1.50 27 1.80 5/8''ROD/2-7/8''TUBING 1.50 27 2.25 3/4''ROD/2-7/8''TUBING 1.50 27 2.28 7/8''ROD/2-7/8''TUBING 1.625 27 2.28 1''ROD/2-7/8''TUBING 2.0 29 2.28 3/4''ROD/3-1/2''TUBING 1.50 31 2.75 7/8''ROD/3-12''TUBING 1.625 31 2.75 1''ROD/3-1/2''TUBING 2.0 31 2.75   3. Temperature Caution Standard models are for applications in wellbore temperature up to 175°F. (fitted with glass…