Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TS200-4B found under Indicator Turn And Slip by Ionia Mfg Co. The National Stock Number assigned to this part is 6610013287824, and the Federal Supply Class is 6610 Flight Instruments. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TS200-4B.