With a diffuser, the smoke becomes cool and soft. So you can connect your 18/8er downtubes and your 18/8er bongs with this Weed-Star slit hole diffusor plug and you can have a better smoke experience, too.
Length*: ca. 13cm
Tube diameter: ca. 5mm
Diffuser holes: 6 slit holes and one bigger hole
*measured from the core's upper edge