The JW 2089 1/2W ABS Series BBb Rotary Valve Tuba Case is an extremely rugged, impact-resistant case made of ABS plastic on a strong, lightweight aluminum frame. Your instrument will be completely secure in a plush velvet-lined interior that is sealed with chrome-plated locks and hinges. Heavy-duty wheels let you roll the case with ease. Holds tubas with up to an 18" bell.