Grav Labs 18.8mm Glass Cleaning Plug

Made by Grav Labs, this glass plug is the perfect accessory for cleaning.

This plug adapts to any 18.8mm male joint and provides a water-tight seal that’s perfect for cleaning your bongs and bubblers safely. No more trying to seal your piece with your fingers! Simply use the plug and shake and clean your water-filled bong with no mess.

The plug features a small removal handle on top and is made out of quality glass construction.