Description:New and high quality iron material.Each saddle and set are complete with screws and springs.They are good accessory for electric guitar.Tremolo Trem Arm Material: Iron, PlasticSaddle Bridge Material: Zinc Alloy, IronBlack colourSize chart:Tremolo Trem Arm Length: Approx.173mm / 6.81inWire diameter: 4mm / 0.16inchWire Length: 14mm / 0.55inchThread Pitch: Approx.0.8mm / 0.03inchSaddle Bridge (LxWxH): 20 * 10 * 10mm (0.79 * 0.39 * 0.39in)Screw (LxW): 18 * 3mm (0.71 * 0.12inch)Spring: 15 * 4 * 6mm (0.59 * 0.16 * 0.24in)Package Includes:1 piece Tremolo Trem Arm6 pieces for Guitar Bridge SaddlesNote:1. The real items will be little different with the real item due to reflection.2. There are 1-3 errors due to manual measurement. Please understand, thanks!This electric guitar bridge is easy to install and easy to access, and can be adjusted to the tone and height level.Dear friend, if you have any questions or problems, please feel free to contact us, we will reply you within 24 hours.