Quartz Core Reactor with Solid Thicker Bottom (14mm male) Go to amazon.com Related posts Top 13 best quartz banger 14mm Featurematerial:real quartzouter diamater:25mm thickness of bottom:4mmquartz core reactor hold heat well !scientific design with good airfloweasy to assemble and take apart, and easy to clean DescriptionQuartz Core Reactor with Solid Thicker Bottom