Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TRP-ET-MA1 found under Tool Kit Electronic System by Snap On Tools Corp. The National Stock Number assigned to this part is 5180014629381, and the Federal Supply Class is 5180 Sets Kits And Outfits Of Hand Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TRP-ET-MA1.