Monster in Ground Adjustable Shield for Pop Up Sprinkler Heads (Straight Shield with 14" Stake) Clear shield is made of a durable polycarbonate. Stake is composed of a high density polyethylene. Fittings are made of stainless steal. Redirects water to the proper area and conserves water. Protects walls, windows, stucco, fences, cars, driveways, sidewalks, siding, flagstone and much more from sprinkler overspray.