This ad features FOUR (4) removable HONEYCOMB glass tobacco bowls that are used with SILICONE PIPES. These 4 bowls are honeycomb style tobacco bowls. The honeycomb tobacco bowl is about 3/4" inside diameter x 5/8" deep inside and a flat bottom bucket shape. The outside diameter of the glass bowl is about 7/8" with a 1" diameter x 1/8" thick glass shoulder along the top edge. These glass bowls are for tobacco use only.