TireGard Silicon Protective Skin The Silicon Protective Skin is specifically designed to fit over the Disregard line of Wireless Tire Pressure Monitors. These high quality silicon skins are said to encase the TPMS monitor to minimize damage or scratches. This Silicon Protective Skin fits all three models: 2 Wheel, 3 Wheel Trike Monitor, and Bike and Trailer Monitor.Silicon protective skin.For Tire Pressure Monitoring System Monitor.Fits all TireGard monitors.