Rubber cushioned sprockets have been widely used by the major Japanese motorcycle manufacturers since early 1990s to dampen the chain impact on the teeth of the front sprocket Made from SCM420 chromoly steel alloy Outlasts any mild steel or surface hardened sprocket 16 Tooth Rubber Cushioned Front Countershaft Sprocket International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.