Thick 0.040 inch cardboard wall blocks wasps from laying eggs, protecting mason bees
Reusable with removable paper liners for sustainable gardening
Available in regular and water-resistant types to suit different climates
Easy to install and remove for convenient mason bee housing
Solid brown color blends naturally with garden environments
Summarized by Shop
These cardboard guard tubes are 5 3/4 inches long with a 5/16th ( 8mm) hole and have a 0.040 inch thick wall which, Chalcid Wasps cannot ovipost through and lay eggs which will destroy your developing Mason bees.
Reusable when used with removable paper liners.
There are 2 types of cardboard tubes available. For dry climates the regu