... , firm sandstone, and firm anhydrite and so on.4.According to your request, all sorts of products can ... ”),508(20”),558(22”),609.6(24”)660.4(26”) Steel tooth(IADC)111, 121,131117, ... 622,632,732Bearing Type:HJ(metal sealed journal bearing) HA (rubber sealed journal bearingNo- sealed bearingPacking & Delivery:Packing ... C at sight, western unionProducts show 8 3/4" IADC 527 Kingdream drill bits for rocks HAS ...