Each unit consists of a wooden resonator box, tuning fork, and a tuning fork mallet. Resonator box is 18cm x 9cm x 5cm. Available in four tuning frequencies listed below. Additional frequencies can be made per your specifications. Additional Info: Each unit consists of a wooden resonator box, tuning fork, and a tuning fork mallet. Resonator box is 18cm x 9cm x 5cm. Available in four tuning frequencies listed below. Additional frequencies can be made per your specifications. Package Size(L x W x H): 12.5 X 4 X 4 (IN) Categories: Waves, Tuning Forks HTS Code: 9209.91.8000 UNSPSC: 6.01048e+007 Country Of Origin: INDIA