The Vapor Brothers Steam Roller (Big) has the VaporBrothers logo etched into the glass and measures 11" long with a 44mm diameter. The VaporBrothers Steam Roller replaces the mouthpiece of your favorite Vaporbrothers Vaporizer Whip. It's more like drawing from a Vaporbrothers Hydrator, except that there is no water to absorb the vapor, and the carb hole is massive, so the whole thing clears in an instant. Quite the performer. Please Note: This is not a water device and uses no water.