Boomwhackers OC-8G Octavator caps

Put one of these caps on the end of a Boomwhackers Tube and presto- boomo!, you’ve lowered the tone by an octave! (That’s 8 notes if you’re counting.)

Play the tubes as usual or hold them vertically and tap on the floor, etc., as a "stamping" tube.

Placing Tube Caps on the higher octave tubes, creates the same tones as the bass octave tubes; Placing them on the bass octave tubes, takes it down another oct