Caution to your car, heavy and unbreakable rubber cone. The weight is 10.9 lbs (4.3 kg), so it will not fly easily in wind or car pressure. The cones are made of synthetic rubber, so they wont break even if they are hit in your car. Used in automotive schools, track scales and more. Set quantity: 10 pieces; Size: 27.6 x 17.7 x 17.7 inches (700 x 450 x 450 mm); Color: Yellow and Black; Reflective: None; Material: Synthetic rubber; Weight: 9.9 lbs (4.3 kg) per piece.