This is a replacement Pair of Traxxas 20x27x4mm Ball Bearings
Pair of 20x27x4 mm black rubber seal ball bearings. A step above blue-seal bearings, black-seal bearings offer an even tighter seal for ultimate protection and less maintenance in dirty environments. (Internal bearing for original X-Maxx® axle carriers and steering blocks. For current-spec bearing, use TRA5196A)
