The Mafra Fall Out Remover is engineered to eliminate tough dirt from your rims. This formula is extremely efficient and contains no acid; as a result, it stays gentle on steel and light alloy wheels. When you apply this remover to the contaminated area, it chemically transforms and dissolves iron residues by penetrating the paint. All you see is the formation of a purple solution that can be easily rinsed.-Black-Size (5.6x10.2x25.2)