Graphtech Black Tusq XL Slotted Bass 6-Str PT-1600-00 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" (4.78 mm); Length: 2-1/32" (51.74 mm) Height: 11/32" (9.09 mm); First to Last String: 1-11/16 (42.73 mm) Model: PT-1600-00