(Brooder plus two expanded Grow-off pens.) This unit is designed for people with limited space. Approximately 48 day old chicks fit in the brooder, which comes complete with base stand, heat and 3 throughs for feed and water. After 4 weeks move 24 of your chicks into each grow-off pen, which also includes the 3 throughs. Now you are ready to start another 48 chicks in the brooder. Brooder on this unit is our Universal Box Brooder, 3GMHB Shipped in 8 cartons.