The Vented 10 Frame Shallow Base is moulded to Langstroth standard dimensions, has two entrances side by side, is interchangeable with your existing brood box and is UV stable for 30+ years. The depth inside the base is 14mm deep maximising the space between the bottom of the brood frames and the base floor. Added ventilation in the floor allows for a more even air flow throughout the hive and encourages hygienic behaviour.