Check the listing for details. Dustite®, Wheel Nut Indicator with Dust Cap, 20 pcs 33mm Yellow Fluorescent. Condition: New. Listed at 39.92 USD. Specifically designed for wheels without protective and mounting rings. Dustite combines a wheel nut movement indicator with a protective cap to indicate wheel nut movement and protect it from external elements such as water, dirt, road salt and rust. By attaching Dustite in a recognizable pattern, such as pointer to pointer, any movement of the nut is clearly visible and shown at a glance. In addition, Dustite melts at a certain temperature to indicate a possible overheating problem. Key benefitsFeaturesAn immediate visual indication of wheel nut movementMelts at a specific temperature to alert to problems with hot running brakes or potential wheel bearing defectsProtection against weather conditions, rust and general wearFacilitates safety checks for fleetsCost-effective and easy to a.