"This Red Mushroom bowl piece features a single hole bowl with a 14mm male direct inject joint.  Themed after the most iconic super hero plumber in the world of gaming, this mushroom bowl piece is a must have for any connoisseur's collection. Features: Borosilicate Glass 14.5mm Male; Direct Inject Joint  Dimensions: Height: 2.25"  Width: 1.25"  Weight: 27g Notes: Individually Hand Crafted in California. Limited Quantity and Availability."