Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3W4-43-5611T found under Cooling Coil Air Duct Type by Engineered Coil Company. The National Stock Number assigned to this part is 4130011604770, 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 3W4-43-5611T.