These GRAV Steam Rollers pack a big punch! The pushed-in bowl is narrow to fit the shape of the long narrow tube. It is a pinch bowl to ensure that you are able to cash the whole bowl at once. Medium ground herb is best used to pack this piece. Your mouth is protected when hitting an entire bowl at once with the inverted ash catching mouthpiece. Hand-crafted on heavy 25mm borosilicate tubing. These GRAV Steamrollers are effective, tough and affordable.