Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number COL05821 found under Cooling Coil Air Duct Type by Trane Co The. The National Stock Number assigned to this part is 4130015424089, 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 COL05821.