These are the stock replacement Diff Rings for the Duratrax Evader. These are on either side of the Diff Gear, and the diff balls ride on them. FEATURES: Durable steel construction INCLUDES: Two Diff Rings (key #120) REQUIRES: The remainder of the differential SPECS: Outer diameter: 19.3mm (0.76") Inner diameter: 13mm (0.52") Thickness: 1.0mm (0.042") COMMENTS: These Diff Rings can also be found in the rebuild kit, DTXC7386. cmc 10/27/01 ir/kh