...as you make the right choice with this fantastic mouthpiece. It fits snuggly into the GRAV family joints, and perfectly in all other universal ones. The look is sleek and the curves are gorgeous when light hits it, as smoke travels through the piece. Mouth-dropping. Not to mention the Quality of craftsmanship to design it. and the quality glass used. With this piece, I got creative, with all sorts of attachments, I placed it on, from STAX pieces, vapes, water pipes, to even ash catchers making a small bubbler. Highly recommend. So get a handle on it, and purchase this, making your GRAV collection complete.