Mason Bee Guard Tubes & Nesting Inserts 36Ct

8mm inserts with protective cardboard tubes. The white paper inserts are easy to peel when harvesting and the thick cardboard tubes protect vulnerable mason bee larvae from most mono-wasp predation.

The cardboard protectors can be used for years, but the white paper inserts must be refilled every year.

If you already have the cardboard protectors, you can purchase refills of the white paper inserts here.