Our new plastic 4-hole nests have filled the need in the industry for nests of a smaller size to fit in smaller pens, The construction and hole sizes are the same as the 10-hole nest but of course the space is greatly reduced. The lids, front and back partitions and perches are all made of plastic. Plastic perches help eliminate harboring places for lice and mites. The side panels and perch brackets are made of galvanized. The 4-hole nest is 24" wide.