About Grav Labs Coin RigThe Grav Labs Coin Rig is a 8" Dab Rig and a Grav Labs classic design. This Coin Dab Rig has a multi slit perc on a fixed downstem. Has a 14mm MALE Joint and comes ready to bubble with a 14mm FEMALE Dome and Nail. SpecificationsDimensions: Approx. 8'' in Height Joint: 14mm Male (14mm Grav Black Dome and Glass Nail are included) Glass Thickness: 5mm (thick glass) Material: Premium-Quality Borosilicate Glass Percolator: Multi Diffusion Slit Manufacturer: Grav Labs |