These are the Traxxas 30-Degree Castor Blocks for the Rustler, Stampede 2WD XL-5 and VXL, Slash 2WD, and Nitro Slash trucks.
Replacement 30° left & right caster blocks
Black Plastic Construction
Two Caster Blocks
Replacement Part For
BIGFOOT No. 1 Officially Licensed Replica
Ford F-150 Raptor
Slash 2WD Unassembled Kit