This urban bird nestbox is part of our new contemporary range of wildlife habitats with sleek design to suit the urban environment the outer shell of the bird nestbox is made from clayplas which is a composite material of 70 clay and 30 recycled plastics this material is very durable and comes with a 10 year materials guarantee along with great environmental credentials due to the recycled element each outer shell has dual keyhole hanging points to allow the nestbox to be hung square on or