Outside material:Imported silver jacketed wire Inside material :Imported nylon Packaging :Paper box Inner packing :Vacuum packaging The strings of ORPHEE-TR series has a fast- string tuning,stable pitch, which enables good performance. The alloy surface is oxidation-proof for its multi-layers processing. MODEL NOTE 1-E 2-B 3-G 4-D 5-A 6-E TR-55 inch 028 032 040 030 035 043 mm 0.71 0.81 1.02 0.76 0.89 1.09