Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W495-654 found under Duct Reducer by Sure Marine Service Inc. The National Stock Number assigned to this part is 4130016265416, and the Federal Supply Class is 4130 Refrigeration And Air Conditioning Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like W495-654.