You’ll need 2 of these. One for the stem, one for the tip. Unfortunately it’s not long for both. *Never submerge the cap that contains the bimetallic discs that click. You will ruin it. *
Here’s the ultrasonic
The tubes serve to enclose the dyna but also to conserve on iso and throughout the height of the pandemic it was a great way to save. I’d fill it with iso, pop in a dash or so of baking soda and then submerge and let the ultrasonic do it’s thing