♪A Clean Bee House: Our paper inserts are easy to gently open to inspect the bee larvae ♪Replaceable Nesting Tube: Strong cardboard guard tubes (sold separately) are available to perfectly fit these paper inserts ♪Environmentally Friendly: Our replacement tubes are made with sustainable materials ♪Bee Tubes can easily be removed and replaced, allowing for smooth recolonizing through different seasons. 50 X Tubes Refill(No retail package)