This is a Sources Sought Notice to determine the availability and technical capability of small and large businesses to meet the Government’s requirement for a new Balance Block. The balance block shall reference AEDC drawing # PG630165, Sheet 3 (Attachment 1 – Balance Block Drawing 1) and Balance Microcraft drawing # WT-98-13586, Rev A (Attachment 2 – Balance Block Drawing 2). The balance block shall be the same as AEDC drawing #PG630165 Sheet 3, (Attachment 1) except the inner land surfaces diameters shall match the balance outside diameters of Microcraft drawing# WT-98-13586 Rev A (Attachment 2). Material to make the balance block must match the material properties of the previously used Nationally #14. The vendor shall provide all material & heat treat certifications, and all inspection reports and documentation. Delivery is required to Arnold AFB located in TN.