... . Quality products & good service 4. Good feedback of clients Rubber seal/metal seal tricone drill bit : size from 60mm to 26 inch,metal ... bearing seal.Main Type Available Size: 6",6 1/2",7 1/2",8 1/2",9 1/2",9 5/8",9 7 ... seal performance.Main Type AvailableSize: 5 7/8",6",6 1/2",7 1/2",7 7/8",8 1/2",9 ... ",9 7/8",12 1/4",15",15 1/2",17 1/2", etc. IADC Code:5-- Series,6-- Series Rubber seal/metal seal ...