... introduction to sucker rod:API 11B sucker rod:1.Grade: C, K, D, KD2.Size: 5/8", 3/4", ... 1", 1-1/8"3.Standard: API 11B4.Material: Carbon Steel5. Sucker rod/ pony rod/polished rod/ sucker rod ... request.2. In order to ensure the metal vertical fiber's continuity and improve the strengh of pin, we ... are up to API SPEC 11B standard, 10 pcs/inch.4. Grade C sucker rod: Moderate strength, not susceptible to ...