Graphtech Black Tusq XL 3/16" Blank Nut Slab PT-4187-00 Play aggressive, shred or bend strings without worry! Lightweight & Highly rigid material for optimum vibration transfer. Length: 2-1/2 (63.50mm) Width: 3/16 (4.88mm) Height: 7/16 (11.10mm) - Blank TUSQ XL Nut Slab - Model: PT-4187-00