The fuses are small and may be hard to find at you local Radio Shack's.  This is a package of 5A 2AG fuses.  These fuses can be used in our PWM Boards at your own risk.  The PWM is rated for 3A continuous peaks up to 6A and has a thermal shut down so you can use these if you want to push the envelope so to speak.   We have used them without issue on our heavier duty ATRs, but the potential exists that you may damage the PWM.