Monster Riser Snap On Non-Adjustable Corner Shield The clear shield is made of a durable polycarbonate. Riser clip material is composed of a high density polyethylene The fittings are made of stainless steal. Redirects water to the proper area and conserves water. Protects windows, stucco, fences, cars, driveways, sidewalks, siding, flagstone and much more from sprinkler overspray.