Tough mar-proof black vacuum-formed ABS plastic shell with aluminum valance. Plush lined. All hardware is backed by steel washers. Interior is foam lined. These cases are manufactured to withstand the rigors of "student abuse," and their universal designwill fit 95% of all instruments. This large frame tuba case will fit common horns like the Meinl Weston 25, Miraphone 186, Yamaha YBB641 and Cerveny CBB681-4681. - the manufacturer