Graph Tech Black Tusq XL-Jumbo XL Blank Nut PT-4000-00 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" (4.88 mm); Length: 1-7/8" (48.01 mm) Height: 13/32" (10.67 mm) Model: PT-4000-00