This beekeeper supplies is made of high quality polyestyrene foam and plastic materials to ensure durability. Mini polystyrene mating nucs can be used for mating queens with only a handful of bees rather than taking a full sized nuc of bees . This mini mating nuc with frame and mini queen excluder to allow the nuc to be moved to the mating apiary. Sized at 9.45 x 5.83 x 6.50 inches Safe shipping and is an ideal starting point for new beekeepers, enabling self-service beekeeping with minimal effort. great for both professional and hobbyist beekeepers