Graphtech Tusq 1 7/8" Slotted Acoustic Nut PQ-6138-00 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: Ivory Thickness: 3/16" (4.8 mm); Length: 1-29/32" (48.21 mm) Height: 11/32" (8.64 mm); First to Last String: 1-19/32" (40.49 mm) Model: PQ-6138-00