Made of 3/8 in. x 1 in. bar stock with smooth, aluminum turned handle approximately 1-3/4 in. long. This nonmagnetic tuning fork requires no plating and will not rust or corrode. The scale letter and frequency is stamped on the fork. Accurately tuned within ±.5% at 20° C. Lightweight, it weighs 1/3 that of steel forks. Class A-3, tuned to Physical Scientific (C-256).