the Gravitron is still considered one of the most efficient smoking devices on the market today

It's been made with a high level of craftsmanship that won't leave you disappointed - not by a long shot

Premium Borosilicate Glass

the Dyno is engineered for precision and portability

Cirrus Grinder - Tile Ships in Random Colors and Designs the Gravitron is still consideredCirrus Glass Grinder, thoughtfully engineered for the everyday smoker. Milled aluminum teeth, sculpted walnut core, and a borosilicate base in perfect harmony. Our classic Tile design gives an old world feel, hand crafted for the perfect grind. PRODUCT FEATURES: Borosilicate glass 6mm thickness Black walnut lid with natural grain Magnetic & silicone closure Aluminum teeth for smooth grind 2. 5inch diameter