1-API or ISO 9001 2- IADC(115-437) 3- High quality & competitive price 4- ... , and clays, with high durability and maximum penetration rates. 2,Soft to medium formations(121,124,126,134,136,137 ... modeAPI formal outer thread(inch)Inchmm 3 1/25 7/8149.2GA2146 1/8155.6GA2148 1/2215.9GA114,GA 115,GA134,GA135, ... Payment Term T/T or L/C at sight MOQ 1 Piece Supply Ability 1000 Pieces/month Delivery Time within ...