Crushed Disc / Fritted Disc Percolation

PKG straight tube 3 hole disc perc

Toro glass disc straight tube

Simba Fishbowl Mega with a huge fritted disk

Simba Glass 18mm Frit Disc × 3

Simba Fritted dish straight tube 
Super smooth stack machine 
Comes with clear 1 hole slide 
Has a couple small defects that were there when I purchased it - there is a scratch on the outside of the tube parallel with the fritted disc, and there is 2 small chips on base but I think it was just a manufacturing defect and not actual chips

Simba Fritted Disc Straight Tube