13 tuning forks each with different frequency Use for activities involving sound wave physics Includes padded wooden storage case Frequency and musical note engraved in each fork Contains 13 plain shank tuning forks with frequencies marked from C(236) to C(512). Essential for studying sound wave physics. Contains: G# 406 F1 362 B 480 F 341.3 E 320 C1 271 D 288 D# 304.4 C 256 A 426.6 A# 456 G 384 C 512