Kuhl 2-Hole Nest is two tier in construction. This nest incorporates all of the advancements in modern nest design including plastic nest bottoms and perches. This unit is ideal for smaller pens that do not have the room for our larger nest models. Hole Size: 7" x 11.5" Dimensions: 12"L x 12"W x 34 1/2"H Shipped "knocked down" for lower transit costs. Recommendation: 8-10 birds per hole of nest.