-These nesting boxes are made using the agricultural natural waste and resin and are truly sustainable  
-The agricultural waste used is: Bamboo, Rice hull, straw, coffee husk and nuts
-Frost proof, for outdoor use; a non animal derived product, 100% vegan friendly and sustainable  -Hanging height is 29cm and the opening is 3cm in diameter. -Overall measurements: D14 x H12 x W16cm.