1. High quality physical experimental instrument, durable and practical. 2. The edges and corners are neat and the surface is chrome plated 3. The tuning fork set is used to demonstrate the resonance of sound in school. 4. Can be used as a Universal tuning fork of a of experiments, such as the sound of the occurrence, interference, sound conduction of substances. It can be used for Music Learning and acoustic experiment. color:Wood color + silver Material:wood+metal Package Contents: 1 x Tuning Fork 1 x Resonant Box 1 x Hammer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.