Healthstone clear oil rig features clear tubing and sandblasted label. This piece is 6.5 inches overall and has a 14mm male glass-on-glass ground joint with diffused downstem percolation.

Comes with frosted Healthstone glass attachment. (14mm female) 

Health Stone Glass is the original creator of the carbon vapor stone insert for use with concentrates. Healthstone Glass has been in business since 2010. Based in California, they do 100% of manufacturing in the United States including the purchasing of all raw materials. Their products are designed for the convenient and efficient toxin-free vaporization of essential oils and concentrates.