190mm TCI Drill Bit for Gas Well Drilling Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.:190.5mm IADC537 tri-cone bitMaterial:Tungsten CarbideUsage:Well DrillingTrademark:SuperiorTransport Package:Wooden BoxSpecification:285mm*285mm*520mOrigin:ChinaHS Code:82071910 Description Pre:6′ ′ TCI Bits for Very Hard Rocks Next:Piling Foundation Rock Bit 8 1/2 Inch IADC537