Hold Up to - 7 small or 5 large trays
 
Inside dimensions: 12 3/8in X 17 1/2in X 27 3/4in.
*This model is not designed for ball python eggs.  It is primarily designed for gecko eggs.  The shelves are very close together and designed to accommodate gecko egg trays.  You can incubate Ball Python eggs but it has a very limited capacity.  
 
Shelves are removable.