Durability: The bicolor cowbell is made of metal material with a total length of 12.6 cm. The package includes a pair of two tone wooden resonance tubes. Multi Color: High and low tones bicolor cowbell is a sturdy multi color cowbell drum accessory, great for enhancing your percussion ensemble. Unique Sound: percussion instrument produces a deep, natural, crisp sound that suits a variety of musical styles. It is a great addition to any musician's collection. Easy to Install: The package includes a complete double mounted bell that can be easily installed on a cowbell stand or other percussion stand. Creative Gift: This music instrument is a gift for children to cultivate their sense of musical rhythm and cultivate their interest in music from an early age. Specification: Material:Metal Size Chart: Length:12.6cm/4.96inch Package Includes: 1High and Low Tone Cowbell Note: 1.This is not infant toy , please take away from children to avoid eating. 2.Please allow slightly errors 1-2cm differences due to manual measurement.