SUPERTAP dowel lifts are made of high quality polyurethane and are characterized by the most extreme high abrasion resistance performance that the industry offers. SUPERTAP manufactures its own steel pin of 3.10 mm (0.12 inches) especially designed to avoid rotation, breakage and accidental extraction when walking. Our standard material thickness of only 6 mm does not alter the position of the original level of the heel and as a consequence of the shoes.