Ideal for rooftop support of equipment and systems. Similar to our low profile model, these risers have additional vibration isolation due to their increased height. Their extra weight will increase stability. Mounting is strong, secure, flexible, vibration absorbing and leak proof while keeping installation quick, practical and aesthetically pleasing. Aluminum linear track permits the use of standard strut hardware (not included). Underside has recessed area to permit easy leveling. Molded from recycled crumb rubber.