4 Pieces 6 mm thread tremolo arm electric guitar tremolo arm thread metal single tremolo arm whammy bar with tip for stratocaster electric guitar tremolo system, 3 colors A nice gift choice for guitar player: Made of quality metal material and plastic top, this standard tremolo arm screw fit with a 6mm thread, 4 pieces are included to meet your needs, wonderful instrument guitar parts replacement for guitar lovers and players. Specifications: Project: single tremolo system bridge arm Material: metal, plastic Guitar tremolo arm color: gold, black, silver Arm length: about 195 mm/ 7.7 inch Thread (diameter): 6 mm/ 0.24 inch Package includes: 4 x Single thread tremolo arm (with 4 plastic end caps) Kindly reminder: Before purchasing, please make sure the threaded hole of the vibrato arm of your guitar is 6 mm.