On display! Promo coming soon! Stay tuned….The large GRAV® Steamroller is 18″ long and made on 50mm tubing. Its ample interior can hold a massive amount of smoke, making good use of its 19mm bowl’s substantial capacity. Two glass feet stabilize the pipe between uses. The steamroller comes ready to use with a removable 19mm funnel bowl and a 19mm plastic joint clamp to secure the bowl during use.