Company Reference:
The 3x24 strip #8891 Ellepot tray is 13/4-inch deep and features fluted cell walls for extra strength that also act as a conduit to get air to the bottom of the cell. Soil volume for loose fill is 30cc.
Image:

The 3x24 strip #8891 Ellepot tray is 13/4-inch deep and features fluted cell walls for extra strength that also act as a conduit to get air to the bottom of the cell. Soil volume for loose fill is 30cc.
Links:
[1] http://www.gpnmag.com/category/topical/trays
[2] http://www.gpnmag.com/blackmore-co-inc
[3] http://www.gpnmag.com/sites/default/files/Blackmore_0.jpg