Replacement battery cover for vintage DOD guitar effects. It seems that there are a lot of effects pedals that are missing this part and the manufacturer no longer has replacements. You can sometimes find used ones on Ebay or you can buy a custom one right here. Tested on FX-60 and FX-42b. Note, logo graphics altered to avoid percieved trademark issues. ;-) Revised on 1/8/14 per input from jamlli (shaved edges where meets metal sides, shaved tab on spring clip, also increased spring tension) I appreciate any input on how well these fit, please leave comments or suggestions.