Double your Martin Cavities with the same pole and gourd rack.
The Bo Stacker is designed for stacking Bo9 and Bo11 gourds on top of one another.
Bo-Stacker is a great tool to Expand your Purple Martin Colony on your current Pole or Rack. works with all Bo9ís & Bo11ís.
Remove the neck from your gourd and Insert the Bo-Stacker where the neck would be installed on the Bo9 and Bo11 Gourds
Using the inspection hole on the top gourd insert the Bolts and washer into the floor of the
Top Gourd. There are two holes that will align with the holes from the bottom Gourds Bo-Stacker.
Insert the lock nuts through the bottom gourds inspection hole & attach the nuts to the bolts.
Screw them together so they are snug.
Maximize your space with the same Gourd Rack Use only with the Fountain Rack 8 & Multi Gourd Rack 12
* Insure your gourd rack, winch, and pole are properly inspected for the weight and daily use. All parts must be inspected daily for wear and tear. As always replace any and all parts that are worn.