I found these on the web when I search for mist sprayer for my tortoises, can they be used for my roddent rack watering system?

Anyone used them before? They are quite a bit cheaper:

http://homeharvest.com/dripirrigationfittingsfeeder.htm

http://homeharvest.com/dripirrigationtubing.htm

Would there be a size problem?

Thanks.