6 Gallon Carboy Airlock Bung Adapter with O-rings

I got tired of the old rubber carboy airlock bungs when i was making wine, so i created this adapter with orings for a tight seal and more stability when adding the airlock.  I used 2 #14 O-Rings from Harbor Freight O-ring kit.  Size O.D. 15/16"  I.D. ¾"  Wall thickness 3/32".  Printed in PETG with 4 walls and 25%infill for a little extra strength.  Working well over and over.  Add a little lube to the o-rings to prevent seizing over time!