When it comes to paper tubes for cavity-nesting bees, I think I've tried everything. But then I found them: the perfect mason bee straws.
Mason Bee House - Bamboo Tube Bee Hotel for Solitary Bees - Attract More Pollinating Bees to Your Garden by Providing Them with A Bee Home Made from
Mason Bee Houses and Supplies : Hand Made Bamboo Tube Bee Hotel for Solitary Bees - Attract More Gentle Pollinating Bees to Your Garden with a Safe Bee Home Made
The best mason bee straws ever, and some alternatives - Honey Bee Suite
Tubes, liners & reeds – Mason Bee Central
The Future Of Food Native Bees The Urban Farm, 51% OFF
The best mason bee straws ever, and some alternatives - Honey Bee Suite
Blue Sky Bee Supply - Beekeeping Supplies, Honey Containers & Protective Clothing in Ravenna, Ohio
The best mason bee straws ever, and some alternatives - Honey Bee Suite
The best mason bee straws ever, and some alternatives - Honey Bee Suite
Bee Houses: Proper Set Up and Care for Mason Bees
How does a bumble bee and a yellow jacket differ? - Quora
Build your very own Bee Hotel - Flowers Across Melbourne