NOTE: Weights for Turbo Kit Variators only. Will not work on any other brand or model of variator. Turbo Kit variators use exclusive size of weights.We give the Turbo Kit roller weights the highest possible reccomendation. They are better than the Gianelli, Polini, CB, WY, Technicas, Metra Kit, even the Malossi out there in the market. These are the only custom made carbonite reinforced roller weights on the market. Light shape and a unique design make them perfect for racing. Only drawback is that you need to have a Turbo Kit variator for them to work, but trust us it's worth the extra money if its for racing.