[8mm 23teeth]
Other sizes : mod he * s * l(mm) 1.5m 20 * 20 * 1000 1.5m 15 * 15 * 1000 2m 20 * 20 * 1000 2.5m 25 * 25 * 1000 3m 30 * 30 * 1000 4m 40 * 40 * 1000 5m 40 * 40 * 1000 5m 50 * 50 * 1000