General description Made from resin with a wooden backing, this swallow nest bird house set is a simple yet effective way to welcome these beautiful birds into your garden while providing them with shelter from the elements. Best placed high to protect residents from predators, the natural-looking resin bowl features a pre-drilled drainage hole. Technical specifications Material: Resin with wooden backing Includes: Set of 2 bird houses Features: Pre-drilled drainage hole Hanging mechanism: Metal hoops for easy installation