Musician&#39;s Gear Economy Mandolin Case for A and F Mandolins Black Rugged and Tough, Withstands Up to 200 lbs of Pressure Without Cracking AxeGuard Polystyrene Interior with Plush Lining This thermoplastic mandolin case is made with a high-density, molded polystyrene interior that gently cradles the musical instrument in a perfectly insulated environment The interior is lined with plush, no-scratch lining that protects the mandolin's finish The hardshell case is made for A and F models