Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HL1-B-TN found under Light Special Purpo by Surefire Llc. The National Stock Number assigned to this part is 6220015494184, and the Federal Supply Class is 6220 Electric Vehicular Lights And Fixtures. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HL1-B-TN.