The Tekno RC 6x17mm Differential Shims (6) [TKR5145B] are high-quality car parts designed for radio control enthusiasts. Made in the United States by Tekno RC, these differential shims are specifically crafted for optimal performance in RC model vehicles. With a harmonized system code of 9503.00.0000, these shims are a perfect addition to your car, truck, or motorcycle for a smooth and precise driving experience.