Hello, this listing is for a New Old Stock, GM 3705261 Ring and Pinion Gear Set for a 1950-1954 Passenger Car as-shown. This is a 3.70:1 Ratio Set. The ring gear "appears" to have a small chip on the outer edge of one of the teeth, it may just be a casting flaw, I am unsure which, but this should not affect use because the pinion gear does not ride there. Please ask ANY questions first! Free Shipping within the USA!