10 frame bottom board X 2 The screen in the bottom allows mites to fall out of the hive. You may spray the sheet with cooking oil and count the mites over a 24-hour period to evaluate your mite infestation. 8 Frame is available also…just send us an email if you want the 8-frame. Thanks for shopping with us! Valley Bee Supply, 46 Tinkling Spring Rd., Fishersville, VA 22939 Quality Types of Boxes Select is the best, almost clear, dime size (or smaller) tight red knots are acceptable, except in frame rabbit, hand holes and finger joints. Commercial is the best seller, a knotty grade, knots can range in size but are tight which do not affect finger joints or frame rabbit. Small tight cracks, panel/finger variations (within a 1/32″) and imperfections are acceptable. Budget is poor quality, a knotty grade, knots can range in size which may be loose and can be any where in the panel. Minor panel or finger alignment (within an 1/16″) issues but a fully functional box. Small repairs may be necessary. We use a low moister white pine for consistency which can affect drying & assembly. We typically run a load within two weeks of delivery to cut down on moister variations. Our box panels are ran through a single machine from start to finish which eliminates human error & inconsistencies which means there are no moister changes between machine runs that can affect fit. Ships via FedEx Ground or FedEx Ground/Home Delivery or Freight (on large orders) within contiguous U.S. states (lower 48 states). Buyer pays shipping to other locations so contact us for details. There is a discount for bulk orders so contact us. ************************************************************************************************************************************************WE ONLY SHIP MONDAY THROUGH THURSDAY, ORDERS PLACED FRIDAY THROUGH SUNDAY WILL SHIP FOLLOWING MONDAY.WE ONLY SHIP TO THE LOWER 48 STATESWe DO NOT ship to Hawaii, Alaska, Puerto Rico. Lower 48 only