OVERVIEW RANDY’S RANDY'S 3/4" BRUSH IS FOR CLEANING LARGE WATER PIPES, HAND PIPES AND VAPORIZERS. CLEAN LARGE WATER PIPES, HAND PIPES & VAPORIZERS! MADE OF NYLON AND GALVANIZED STEEL. FEATURES 1 1/2" BRUSH (3" X 13") CLEANING LARGE WATER PIPES, HAND PIPES AND VAPORIZER MADE OF NYLON AND GALVANIZED STEEL