... body ...3.API Tricone Rotary Bits1,Types: steel tooth tricone bit (mill tooth tricone bit) and tricone bit(tungsten carbide inserted tricone ... HSN rubber o-rin provides adequate sealing for bearing durability .5.size and model we can provide: 60mm,65mm,76mm,93mm,95mm ... ,118mm,120mm,127mm(5”)130.1mm(5 1/8”),133.3mm(5 1/4”),139.7mm(5 1/2”),142.8mm(5 5/8”),149.2mm ...