Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HEATING-BLOCK-LARGE-WELL-110V found under by Charm Sciences Inc. The National Stock Number assigned to this part is 6640015515505, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HEATING-BLOCK-LARGE-WELL-110V.