Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SYL H4 12V60 55W found under Headlight by Freightliner Corp. The National Stock Number assigned to this part is 6220016895914, 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 SYL H4 12V60 55W.