The Red Mason Bee Nest Box provides an excellent nesting site for solitary bees, including the red mason bee. The nest box is supplied with 29 individual nesting tubes, two sets of screws and plugs for mounting, and full instructions. Mason bees are docile, safe bees and excellent pollinators of fruit trees, raspberries and early strawberries. The female mason bee creates individual cells using mud, each cell contains one egg and its own store of pollen. The appearance of a "mud plug" at the end of the tube indicates a completed nest.