General description Made from resin with a wooden backing, this house martin nest box is a simple yet effective way to welcome these beautiful birds to your garden while providing them shelter from the elements. Technical specifications Dimensions: 19 cm x 14 cm x 14 cm Material: Resin construction with wooden top and back Features a drainage hole in the base Installation Best placed up against the eaves of a building to protect residents from predators Wooden backing board features two metal hoops for easy installation over nails or screws