Features: Make of Brass, Zinc Alloy, Enduring and anticorrosion. Improves the stability of a floating tremolo bridge, bringing a solid stabilizing base to keep your guitar in tune. Automatically returns your floating tremolo to its exact zero neutral position, eliminating annoying flutter, keeping your guitar staying in tune. Suitable for electric guitar tremolo bridge system. Guitar Bridge Spring Stabilizer is Easy to install, in the back cavity. Specifications: : Brass, Zinc Alloy Type: Double/Single Size: As shown in the picture Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1Set Guitar Brass Tremolo Stoppe Stabilizer