API -11B sucker rod: (1)size(O.D): 16, 19, 22,25,29,32,38, (2)grade:K,C,D (3)lengh:7.62--10.0m Specifications for sucker rod: NameSize Grade Mechanical propertiesLength(m) σb (MPa)σs (MPa)δ(%) ψ(%) Steel sucker rod and pony rodφ16φ19φ22φ25φ29φ32φ38K62079341413507.628.009.1410.00C6207934141350D7939655861350 sucker rod line