The quality of the wood and the workmanship make these an exceptional value.Tyler Mountain imports these directly from Germany where they are made from the finest ebony and pre-shaped to make installation a breeze. You might find others on eBay that are similar, only they are made in China or Korea and not nearly as durable or well made. These Tyler Mountain bridges are sure to satisfy. Features EbonyHeight: 24mm to 29mm (15/16 to 1-1/16) Base: 112mm (3-3/16) High string to low string: 35mm (varies, unslotted) Post to Post: 58.5mm (2-9/32) Note: These bridges are adjustable, meaning you can adjust the height to suit your needs. These are not pre-slotted so that you will have some flexibility when you are installing your new bridge as far as string spacing and depth.