The Portland Design Works Owl Cage is made from a single sheet of lightweight 5052 alloy. Cut in the shape of a Great Horned Owl, its wings fold in to securely cradle your water bottle. Get an Owl and make your ride fly. - Constructed of 5052 alloy - Weight: 67 g (2.3 oz) - Includes two stainless bolts for installation - Lifetime PDWarranty