The Car Wiper Plug is a waterproof blue rear windshield wiper block off grommet cap designed for universal vehicle service type. It features a pinch tab mounting type and weighs only 0.176 ounces. This product is a simple solution to block off the rear windshield wiper when not in use, preventing water entry into the car. Easy to install and highly rated, this wiper plug is a convenient accessory for car seat safety seats.