The outer shell of the urban bird feeder is made from clayplas which is a composite material of 70 clay and 30 recycled plasticsr the clayplas 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 bird feeder to be hung square on or as a diamond to suitr the interior cassette of the feeder is now made entirely from recycled plastic for superior bird hy