Johnson CG-040 Thermoplastic Case These Thermoplastic cases use the latest technology in plastic manufacturing. These cases are tough - withstanding up to 200 lbs.. of pressure. The specially formed Polystyrene interior gently cradles the instrument in a perfectly insulated environment. In addition, the cases have a very classy look to them. These cases are an extraordinary value at there unprecedented, low price! They are available for Full Size Electric Guitars, Drednaught, Classical, Electric Bass, Les Paul-Style, Mandolin Fit All, and Harmonica.