The new Octavator Tube Caps drop the tone of a tube by an octave, creating a possible 3-octave range. Play the tubers as usual or hold them vertically as a “stamping” tube. 8 caps in a bag. Put one of these caps on the end of a Boomwhacker tuned plastic percussion tube, and you’ve lowered the tone by an octave (8 notes lower in sound)! Play the tubes as usual or hold them vertically and tap the capped end on the floor. An economical way to extend your range of notes, as well as an easy way to make lower notes more accessible. For example, a capped tube from the Set of 8 Diatonic Boomwhackers (available separately) can be much easier to handle than a longer bass tube.