GOTOH 18mm pitch 5-string bass bridge, 6-point mount type. The J510 model's base plate uses hard zinc material, known for its tonal qualities, to create a more resonant sound. - Model Name: J510SJ-5 - Material: Hard zinc plate / Steel saddle - Finish: Chrome - String Pitch: 18mm - Included: Mounting screws Brand new, unused, box is damaged. Thank you.