Tecatlantis EasyBox Fiber Filter Media Cartridge for Mini Biobox Filters 1 and 2 / BIOBOX 0, XS

I had to heat end of scissors to make hole go through for air line. Seems to have a half depth hole that doesn't go right through in each corner. Also can't see a way to take apart to change filter wool. I wouldn't make a fuss for price paid. Arrived super quickly.