Adjustable Tuning Fork for Musicians & Choir - Full Chromatic Scale (A440) Precision made, Laser cut High Grade Stainless Steel Tuning Fork Simply move the Adjustable Slider - range from Low B to High D (A440Hz) Machine-etched Note lettering for easy legibility Slim & Lightweight with buffed edges to fit easily in pocket - Size: 6" x .75" x .163" Made in USA with 100% Satisfaction Guaranteed - Money Back Warranty