WD Plastic Replacement Mandolin Nut - Single Fits Many Mandolin Designs High Quality, Precision Molded Pre-Slotted Length: 1 7/32" (30.9mm) - Height: 1/4" (6.35mm) - Thickness: 3/16" (4.76mm) - String Spacing: 29/32" (23.01mm) Available at Ant Hill Music!