Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VR4010 found under Receiver Light Signal by International Fiber Systems Inc. The National Stock Number assigned to this part is 6030013647905, and the Federal Supply Class is 6030 Fiber Optic Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like VR4010.