Be sure to add me to your favorites list Casio Keyboard Made in Japan Replacement 3 inch / 4 Ohm Speaker for some SA, MT, and SK Model Casio Keyboards. This is a very good condition speaker for a mid to smaller sized Casio keyboard. It is a 3 inch speaker, made by Casio and used in some of the smaller sized Casio keyboards (with half-sized keys or smaller) with the model number starting with MT, SA, and perhaps SK as well. It's 4 ohms and in great condition and working perfectly. You can see in the photo where the 4 screws used to screw it in are attached to the magnet in the speaker and they will be included as well. You will have to splice or solder the wires to get them to work with your keyboard obviously. Please make sure your Casio keyboard takes the 3 inch speaker with these specs and they should make a great replacement! Though the speaker itself is 3 inches, when I measure the speaker diagonally it is 3 5/8" inches across, which might be helpful in deciding if this type will fit your Casio. The part # listed on the back of it is EAS-8P109SB, and it was made in Japan! Please check out my Store!