sucker rod guide, sucker rod guides is also called sucker rod centralizers Material: Nylon Size: 3/4, 7/8 for 2 ... -7/8 tubing Specifications1. sucker rod guide, sucker rod guides is also called sucker rod centralizers 2. Material: Nylon3. Size: 3/ ... 2-7/8 tubing 1. sucker rod guide, sucker rod guides is also called sucker rod centralizers2. sucker Rod Guides provide larger wear surfaces and last ...