This is for FIVE propolis collectors. 

Best time to use is in the Autumn.

Collect propolis from your hives. Remove inner cover and replace with propolis trap. Raise top cover so that light gets into hive. Bees will fill cracks in trap. When ready, remove trap and place in freezer for a couple of days. Remove propolis by placing collector in a bag and flexing trap.

Flexible, durable rubber.