Fits 4-string or 5-string electric bass with string-through-body bridge system
Total height: 25.5mm (1.0 inch), small hole diameter: 4.6mm (3/16 inch) for string through, big hole diameter: 8mm (5/16 inch), requires 9.6mm (3/8 inch) mounting hole. Please check our size image before you buy
Made of brass, good durability and corrosion-resistance
Used for mounting the strings through the body, fix them and make them vibrate more effectively, improve the resonance and increase the delay, bring more stronger tones