Snow Pusher, Spring Steel Blade, 30 In. Reliance reclamation erosion control and recreation areas 39604343 reclamation erosion control and recreation areas Durable rust free galvanized wire meshPredator guard extends entrance hole to protect against predatorsPredator guard entry hole has a diameter of 1 1 2" Predator guard with an entry hole 1 9 16" in diameter for Western bluebirds can be purchased separately on the Replacement Parts page and retrofit to the bluebird houseBluebird house body has an entry hole with a diameter of 1 9 16" to allow it to be used for both types of bluebirdsFledgling kerfs provide extra grip for fledglings to climb out 30 Inch Braced Spring Steel Snow Pusher with 48" hardwood handle and heavy duty steel heel Spring steel blade will flex under stress and return to original shape