Graphtech Black Tusq XL Slotted 12-Str 3/16" PT-1500-00 TUSQ is very easy to sand or file and is very resistant to chipping or flaking. TUSQ nuts provide the best tonal link between your strings and guitar neck. Color: Black Thickness: 3/16" (5.05 mm); Length: 1-3/4" (44.45 mm) Height: 9/32" (7.47 mm); First to Last String: 1 1/2" (38.1 mm) Model: PT-1500-00