Living World Maize Peel Bird Nest for Finches provides a comfortable and secure shelter for nesting pairs and their young. Made of natural Maize peel, the cozy nest encourages natural breeding. The nest comes complete with a metal hook for easy installation on the bird cage wiring. For indoor use only. Size 8cm(3.1") x 10cm(3.9")x 12cm(4.7"). Nest opening: 5cm x 4cm (2" x 1.6").