Planet Waves Tuning Fork, Key of A 61 Key Covers providing much quieter practicing than

providing much quieter practicing than the drum head type surface

A variable passive high pass filter provides a minimum phase shift design while eliminating low frequency rumble

6 mm (W) x 2

It's built tough to last

compensating for room size

Planet Waves Tuning Fork, Key of A 61 Key Covers providing much quieter practicing thanThe Planet Waves "A" Tuning Fork makes it easy to tune any instrument by ear by providing an extremely accurate A440 reference Pitch. Perfect for tuning all instruments from guitar and bass to band and orchestra instruments. Precision designed to offer extremely accurate tuning (A 440 Hz) Molded, ergonomic comfort handle is easy to hold Color coded O rings allow easy key identification Fits easily in any instrument case Durable chrome plated finish