The Borometer Banger from GEAR Premium® is made of quartz and features a colour changing frit that signals when your banger has reached the desired temperature. Feel the GEAR Premium® difference and order one today! The Borometer Banger from GEAR Premium® is made of quartz and features a colour changing frit that signals when your banger has reached the desired temperature. Feel the GEAR Premium® difference and order one today! FEATURES & SPECIFICATIONS Joint Diameter Size 19mm Material Quartz Colour Clear ADDITIONAL DETAILS Product Features: - Made of quartz - Colour changing frit What's Included: 1 x 19mm Female 45 Degree Borometer Banger (#GX1212) 1 x GEAR Premium® Box