Be sure to add me to your favorites list Casio Battery Cover Door for AA Size Batteries for Many Casio Concertmate Keyboards, SK-1, SA-5, Many Other SA, SK, Some MT Models, etc. This is a Casio battery cover for some Casio portable keyboards. It will fit perfectly over the battery compartment of many of those models that accept "AA" sized batteries. Let me know your model # and I can help you decide if this will fit if you are not sure. It fits the extremely popular SK-1 and many other Casio models (and some Concertmate models, which were often re-badged Casios) keyboards that use AA batteries, including many of the older SA models, a few of the MT models, some SK models, and others. This is in very good condition, with some very minor wear from use but it's not warped or cracked, and it has it's latches intact. This cover is a medium gray color, but will work fine on the keyboards that are white, black, grey, red, green and other colors that the bottom of Casio keyboards have been produced over the years. There are both Casio and Concertmate models that will accept this size battery door cover. It is 3" inches long, and 3/4" inches wide (not including the latch). It will complete your keyboard, and keep your batteries inside, with no need for tape. So replace your missing or broken battery cover door with this one! I have 2 of these available at this time. Thanks for looking! Check out my Store!