Wilkinson WBB-5C This is a Wilkinson U.S.A WBB-5C bridge for bass guitars. The string spacing can be adjusted freely, allowing you to change a single bass guitar between 4-string and 5-string configurations. There is dirt and dullness on the chrome parts. Please refer to the images for the dimensions. Mounting wood screws are also included. This item is also listed on other sites, so it may end early.