"Will fit up to a 15.5 gallon keg or a keg up to 26" high. Product Dimensions: L 20.3" x W 26" x H 32""
26" is a tight squeeze; Other then that, based on pure dims given (not interior) I could see two, MAYBE three cornies... If you don't have one. they are about 9' diameter, and about 25' high. With the connections on, 26' might be do able providing you put them on then slide the kegs in. It will still probably pinch the lines, which could cause CO2 collection etc. If it's more then 26, you should be safe assuming 2 kegs. Break out the tape measure! (Cardboard/paper cut outs of 9' circles help in sizing).
Hope this helps/works out for you! Home brew is much cheaper then commercial, and better!