This product is a genuine OEM piston ring set designed specifically for Ducati Monster 900 and 900SS motorcycles from 1999-2002. Manufactured in Italy, the set includes piston rings with a diameter of 92mm. The part number 12120291B ensures compatibility and quality assurance for your engine. Perfect for motorcycle enthusiasts looking to replace worn-out or damaged piston rings, this set is a reliable and authentic choice for maintaining the performance of your Ducati motorcycle.