This 13 Baseball Upright Baseball display case is made of all glass and supported by real wood. This case is UV protected and is supported by your choice of cherry, walnut or black moulding. The already assembled shelf is also made of real glass. Our glass will never scratch or haze over time. Our adhesives contain no acids that may deteriorate signatures. The inside dimensions are 17 x 4 x 11.25. This display case also includes 13 clear holders for your baseballs.