... 29kg, suit for machine J300CAT TEETH 9W1553-29kg The rock penetrator was designed by Hensley, as an alternative ... 9400/7T3403RP17J400138-6459/W1453RP23J450/460138-6552/9W1553RP29J550superior Mechanical Property of CAT TEETH FOR 9W1553-29kgMaterialHardnessV-NorchTensileElongationYeildT147-52HRCakv>=16J>= ... Grade 1 material, we reduce the alloy composition,therefore the wear life is 2/3 of Grade 2. And our Grade ...