This is the Housing Guard for the ball-less vaporizer. Compatible with most 20mm e-nail coil driven housings, if you're purchasing this for a different setup, please ensure it fits beforehand. 

Details

• Stainless Steel Housing Guard for Thermal Twist and Ruby Twist
  
• Bolts and Allen Key Included
• Internal Diameter Approx. 31.5mm
• Height Approx. 40mm