What is a balance weight... The wheels mounted on a car are "weight" so that they can rotate without shaking or shaking. The wheels are precision molded but have a slight heavy area that will cause subtle shake when rotated, which will affect your ride and steering wheel. Driving without adjusting this balance can cause rough wheels and cause serious trouble. Balance weights are the role of balancing the wheels to prevent trouble and provide a comfortable ride. Thin and notched in 1 piece, 5g and 10g 400 pieces each. [Product Details] Size: (approx.) 0.2 oz (5 g); Piece Width 0.4 x Height 0.7 x Thickness 0.1 inches (11 x 18 x 3 mm); 0.4 oz (10 g); Piece: Width 0.9 x Height 0.7 x Thickness 0.1 inches (23 x 18 x 3 mm).