Wholesale Dab Rig Accessories The Mondo dual carb cap measures 2.2" x 1.25" and features clear boro glass and a design that works well with banger and thermal nails. Carb Cap Features: Use: Concentrates Size: 2.2" x 1".25 Clear Borosilicate Scientific Grade Glass No Logos or Brands Made for Mondo Thermal Quartz Bangers 31.75mm Diameter