Very good performance three cone rotary bit, high downhole speed and long working life 9 7/8" IADC537G is a regular types, we ... : 60mm,65mm,76mm,93mm,95mm,98mm(3 7/8”), 114mm,118mm(4 5/8”),120mm(4 3/4”),127mm(5”)133.3mm ... /2”),193.6mm(7 5/8”),200.0mm(7 7/8”)215.9mm(8 1/2”),222.2mm(8 3/4”) 241.3mm(9 ... ,637,737512,522,532,612,622,632,7323 cone rotary bit 4 5/8"IADC537G