Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GB1 4B KESON found under Chalk Line And Reel by Kipper Tool Company. The National Stock Number assigned to this part is 5210014377932, and the Federal Supply Class is 5210 Measuring Tools Craftsmens. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like GB1 4B KESON.