Keyboard 1/4 Ply Light Duty ATA Case with All Recessed Hardware Fits Korg Sp250 Sp 250 Keyboard Important - Please Make Sure You Measure Your Unit Before Purchasing. See Product Description Inside Dimensions (Usable Space - Foam to Foam Dimensions) 51 1/2 x 15 1/2 x 5 1/2 High Laminated Plywood Thickness is Stated in the Title All Bindings and Channels are Machine Split Riveted All Quality Hardware and Interior Foam Used is Depicted Exactly as Shown in Photos