Not made in China! Made from High Carbon Steel SAE 1045/49/SCM415. Fits 420 Chain. See picture for exact measurements. Check your current tooth count before ordering. Larger size sprockets in the rear give you more take off power with less top speed. Smaller rear sprockets give you more top end speed with a slower take off. Larger rear sprocket may require removal or modification of chain and sprocket guard.
Some sizes are special order. Allow a few extra days.