7" Helix™ Classic Hand Pipe made on 32mm tubing with spoon head, Venturi chamber mouthpiece, and air filtration to cool and spin smoke...The classic Helix Hand Pipe is 7" long and made on 32mm tubing. The familiar spoon head is fused to a Venturi chamber mouthpiece, featuring three air intake holes that cool and spin smoke. Two feet stabilize the piece between uses. The Helix design both filters smoke and conserves plant matter. No accessories or water are necessary for using this hand pipe.