Exotek RC 1545 Flite Spur Gear 48P 75T Machined Delrin for Exo Spur Gear HubsHere at Exotek Racing we use research and development backed by 20 years of R C car experience to test and evaluate every single part we create. We are what you could call prototype happy'. We aren't the first to market with our products because we are probably still testing them. with prototype after prototype. until the fit and performance of the part is just right. We hope you will be impressed with your Exotek products.