You can have a 4th frame of brood added to your 5 frame nuc, for IMMEDIATE installation in your Standard Langstroth deep brood boxes. No more than ONE extra frame of brood per Nuc. If you need more bees than that, order a full hive please! That one extra frame (could be partial, different stages etc.) will increase the demand for space quickly and could easily abscond from the nuc box based on lack of space and resources, so BEE CAREFUL if you order this LIMITED OPTION! NOTE: Adding an extra frame of brood could delay pickup/delivery dates. ALSO NOTE, you can order single frames of brood for pickup or delivery (trip/delivery fees must be added) and you MUST supply a Nuc Box for pickup.