1. With brass roller saddles, height adjustable.2. Both Bridge and Tailpiece are curved to accommodate the radius of the neck or for use on an arch top guitar.3. Fits for , , SG electric guitars...4. Roller saddle to reduce friction and wear,reduce string breakage,help you stay in tune.Bridge:Bridge size: 84.3mm x 17mm.The distance of two studs:73.5mm. spacing: 51.5mm.Tailpiece:Tailpiece Size: 99.5mm L x 16.8mm W.The distance of two studs: 81mm.Studs body diameter: 2mm.Colour:blackMaterial:Zinc alloyPackage Contents:1 X Roller Saddle Bridge & 2 Studs1 X Tailpiece & 2 Matching StudsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.