Set of 2 Heavy Duty Tuning Fork with Resonance Box and Hammer Sympathetic 16.5cm (6.5") Tuning Forks 440Hz Rulers Wooden board size 68cm x

Wooden board size 68cm x 9cm

Size: 25cm x 25cm

20" x 26" heavy paper laminated with grommets

Ripple & Noise: 70mVrms

Premium Quality: This Product is made of high-grade construction all the way through

Set of 2 Heavy Duty Tuning Fork with Resonance Box and Hammer Sympathetic 16.5cm (6.5") Tuning Forks 440Hz Rulers Wooden board size 68cm xIncluded: Set of 2 Heavy Duty Tuning Fork with Resonance Box and Hammer Sympathetic Tuning Forks 440 Hz. Each of the large Aluminum Alloy tuning forks is hand ground to high accuracy and has a frequency of 440 Hz (hertz=cycles second). Each fork measures 16. 5cm (6. 5") long & is mounted on an individually adjusted resonance box. They have been carefully matched and individually electronically tuned for tonal clarity to their designated or physical