Do not buy this unit if your serious about keeping your hens safe.  Both nesting boxes collapsed within five days of assembly.  I usually build my own. But, We where moving so I thought it would be convenient. It’s been anything but convenient.  
I asked for a refund and they want me to pack it up and go to a fed ex store to ship it.  I’m going to do that, but after assembling, lasting five doors before the cheap product literally falls apart. I have to build my own anyway.  
Not one star is deserved here.  Stay away from this product.