This firm fixed price purchase order was awarded by the Department of the Navy Fleet Forces Command Atlantic to Wartsila Defense Inc. for the delivery of stern tube packing. The solicitation sought a sole source procurement of four packing follower assemblies from Wartsila as the original equipment manufacturer and sole provider. Wartsila owns the proprietary rights to the required packing follower assembly and latest engineered design changes, making it the only source that can provide a component compatible with the stern tube seal and meeting the government's needs. The $109,216 contract will deliver the parts to support maintenance of the USS Detroit as it undergoes towing, requiring proper stern tube shaft seals installed using original manufacturer repair parts to ensure fit and function. Performance will occur in Chesapeake, Virginia through July 2023.