These bottom rollers suit CAT E303, E304, E306 and 307 mini excavators. Crafted from high-density alloy steel via full-depth quenching, they sustain outstanding abrasion resistance across muddy and stony job environments. Premium dual floating seals bar grit intrusion and avert lubricant leakage, manufactured to original factory dimensions for trouble-free swap-in. Direct sourcing from Tianjin Longdong with cost-efficient factory rates, custom part number engraving can be arranged.