Complete Kit Solution: The Windscreen Kit includes all that is needed for complete set up and use. Each kit includes the necessary modular suspension mount, windshield, windjammer and extensions Hytrel Plastic Construction: A material called Hytrel is used on the end rings and shield. The material aids in creating the 'dead' space necessary for quiet operation Interlocking Ends: Modular locking end rings provide quick and easy replacement of dented ends and modular extensions