The Vapor Brothers Small Steam Roller (Small) has the VaporBrothers logo screen printed onto the glass and measures 11" long with a 32mm diameter. Replace the mouthpiece of your favorite Vapor Brothers Vapor Whip with the VaporBrothers Small Steam Roller. It's more like drawing from a water pipe, except that there is no water to absorb the vapor, and the carb hole is larger than ones found on the Vapor Brothers Hydrators, so the whole thing clears in an instant. Please Note: This is not a water device and uses no water.