SC-3 is made of laminated recycled tire rubber pads assembled on 3/4" bolts and compressed between 1/4" steel plates. The positive grip fabrication is contoured to fit the curvature of tires. SC-2 is ideal for utility trucks and equipment, as well as large cable rolls and buses. Available only in black (14 lbs. each). Material: Laminated Recycled Tire Rubber Pads Color: Black