144 pieces of 1/8 ounce (3.5 gram) weights, twelve strips per box with twelve 1/8 ounce (3.5 gram) segments per strip. Made from steel, lead free. Adhesive backed wheel weights will work on spoked or cast wheels. 10.2 millimeter x 13.1 millimeter, vertical orientation for proper alignment when used in combination with Motion Pro 1/4 ounce weights. Black powder coat finish.