L=210mm / D= 23mm / W=15mm MADE OF PLASTIC
A simple device to help stop robbing from wasps.Ā Comes complete with 2 x stainless steel screws for fixing to your front block.
Both ends can be total removed or can be left open and both ends can be slid back into the closed position for moving bees and still allowing ventilation.
ALSO FITS OUR POLY HIVES.