Polished rod clamp | Petroleum Machinery China rod size 1-1/8, 1-1/4, 1-1/2 single bolt, double bolts, three bolts. stuffing box 1-1/8-3/4. www.soright-tech.com/ API 11B sucker rod | Petroleum Machinery China grade C,D,K,5/8 to 1-1/8,material 4330,4310. stuffing box 1-1/8-3/4. www.soright-tech.com/ |