Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 117-7155 PARTS KIT A found under Parts Kit Light Sigmoidoscope by Welch Allyn Inc. The National Stock Number assigned to this part is 6545012688782, 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 117-7155 PARTS KIT A.