The Otamatone Official Slim Case is specifically designed for the 17.25 inch Otamatone Deluxe. It provides a perfect, custom-fit for the Deluxe version of the Otamatone. This case is not compatible with other variations of the Otamatone, particularly models that have an unusual or non-standard shape. Durable Hard Shell The outer shell of the Otamatone Slim Case is made from Eva (Ethylene-Vinyl Acetate) material, offering excellent shockproof properties. This durable shell guards your Otamatone against accidental drops, impacts, and scratches, giving you peace of mind while traveling or storing your instrument. Whether it's in a bag, in the trunk of your car, or on a shelf, this case ensures that your Otamatone remains safe from damage caused by external forces.