Pine Car P3919, Tungsten CoG Weights. Fine-tune your car's Center of Gravity (CoG) and optimize performance and stability. Includes four 1/2 oz (14.1 g) screw-in Tungsten CoG Weights™. Use weights individually or as 2 to 4-unit sets. Screw-in and adjust with an Allen wrench. Weights are 3/4" in length, tip to tip, and 3/8" in diameter. Use a 23/64" size drill bit when drilling a hole for weights in the car body.
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