Haige provides API 11B Sucker Rods in diameter 5/8in to 1 1/2in.1. Sucker Rod, API Sucker Rod, API 11B Sucker Rod2. Material: Grade C, D, K, KD,H,I, HL, HY3. Specification as per API 11B4. Polished rod, pony rod, sinker bar ,sucker rod guide all supplied