Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ETHAFOAM 221 found under Plastic Sheet by Flextron Industries Inc. The National Stock Number assigned to this part is 9330011225904, and the Federal Supply Class is 9330 Plastics Fabricated Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ETHAFOAM 221.