This is a package of Differential Shims for the EB-48 Buggy Kit TKRC5000, and SCT410 from Tekno RC. FEATURES: Steel construction INCLUDES: Four Differential Shims SPECS: Inner Diameter: 0.236" (6mm) Outer Diameter: 0.67" (17mm) Thickness: 0.0196" (0.5mm) jxs 11/23/12 ir/jxs