The Rock Slide makes slide tubes that are better shaped than traditional tubes and provide increased flexibility and comfort. This one is made of ceramic in size medium and shaped so that the supporting finger can lie stable. It is rounded/sloping in the opening to fit better in the hand when playing.
Ceramic Rock Slides have an ultra hard/smooth finish similar to glass but produce more sustain and low end since they outweigh the glass, and even our brass slides.
They are much more durable than glass being made out of high heat industrial ceramic rather than typical coffee mug style studio clay. Hi-tech injection molding gives you the same tapered interior and other Rock Slide features you've come to love on the other models.