Hohner “EXAMINA 1” Harmonica Testing Bellows. Test any brand or model harmonica accurately and hygenically with the Hohner harmonica tester. Simply hold any style or brand harmonica to the test holes, squeeze the tester and you will be able to get an accurate assessment of the reeds of any model mouth-harp. This item, from Hohner, the #1 maker of harmonicas in the world, is a must for any harmonica collector or mouth-harp aficionado.