With the double cone design, the SC bush can be installed on both sides. To install the SC bush we need a least the X distance. A standard taper-bush can also be fitted on both way. - Steel XC 38 - Standard NF E 26102 - For british standard chain type B - Protection from the corrosion. - Bichromate coating up to 40 teeth - Resists 200 hours in salt spray - Food compatible.