Made from steel, lead freeAdhesive backed steel wheel weightsBlack powder coat finish144 pcs of 1/8 oz (3.5 g) weightsTwelve strips per box with twelve 1/8 oz (3.5 g) segments per stripAdhesive will work on spoked or cast wheels10.2 mm x 13.1 mm, vertical orientation for proper alignment when used in combination with our 1/4oz weights