Ferrules Tuning Pegs Tuners Electric Guitars for Acoustic Music Specification: Features: This product is made of copper-zinc alloy, steel and acrylic, texture with fine workmanship, solid, firm and durable to use, ensures a long service time. Comes with screw, springs and other mounting accessories, no extra tools needed, very easy to install and operate. This is a fantastic tremolo for manually creating a true vibrato. This is highly controllable within its range of motion and requires little force to operate. Great guitar accessory part, quite suitable for ST guitar. Specifications: Condition: 100% Material: Copper-zinc Alloy+Steel+Acrylic Weight: Approx. 230g / oz Bridge Size: Approx. 8.4 x 4.9 x 4cm / 3.3 x 1.9 x 1.6inTotal, 10.5mm / 0.4inString Spacing / Spring Installation Hole Spacing Backboard Thickness: Approx. 2mm / 0.1in Saddle Thickness: Approx. 5mm / 0.2in Bridge Mounting Screw Size: Approx. 2.7cm / 1.1in Optional Color: Gold, Black, Silver Package list: 1 x Bridge 6 x Bridge Mounting Screw 1 x Tremolo Bar 1 x Claw 2 x Claw Mounting Screw 3 x Spring 1 x Wrench Note:The color of spring fixed claw is shipped randomly, and make sure you will not mind before ordering.