THIS LISTING IS FOR SIX (6) ThunderJet SHORT Rear Axle. This axle is an exact copy of the original Aurora ThunderJet Short rear axle. The spline pattern and length exactly matches the original. They are made from 1/16" (0.0625") stock 1018 steel and extra insistance was placed on making sure they are straight. The splined areas on original Aurora axles can vary widely. The spline area on these axles can vary in diameter from .0625" to about .0635", a variation of approximately 1.6% This axle can also be used on T-Jet style chassis by Johnny Lightning, Auto World, Dash. Sold as is. Descriptions are very accurate; No Returns. PLEASE ASK QUESTIONS BEFORE YOU BUY IF YOU ARE UNSURE. We ship promptly professionally. We happily combine orders refund any excess s/h immediately upon shipping. We can always provide tracking. I charge $1 for expert handling/packaging, actual shipping. We ship out of the country almost daily. Please refer to our feedback, social media or time selling HO slot cars for assurances of a good honest deal. Happy motorin' thanks S'lots from Bob at Slot Car Central in SYR. We Know H.O.