Safe storage bag for mason bee nesting reeds and blocks and also leafcutters. Provides protection from other predators like ants, parasitic wasps, carpet beetles, and other pests and keeps them from gaining access to your developing bees. Fits two large (96-hole) mason bee wood nesting blocks, two large (104-hole) leafcutter nesting blocks or approximately 400 nesting reeds / tubes. Bag is 20″ x 21″ and is reusable. Exact color / style may vary from photo.