Boost your garden’s pollination with Cardboard BeeTubes and Inserts for Mason Bees. Designed for solitary bees, these sturdy cardboard tubes fit most standard bee houses and nesting blocks, providing a clean, secure space for egg-laying and larval development. Smooth interiors protect delicate wings, while replaceable inserts make seasonal cleanup and mite control simple. Ideal for home gardeners, orchards, and native bee enthusiasts, these eco-friendly bee tubes support healthy mason bee populations and more productive flowers, fruits, and vegetables. Perfect for starting or expanding your mason bee habitat.