501031-050 Lawn and Garden Post Cap (Red) (50 Pack) - These battery terminal caps are designed to protect the alternator and electrical system from shorts and reduce the risk of a battery explosion caused by sparks. Made of LDPE. Features include, Test hole for testing charge without removing terminal protector. Large flange covers entire lead area. Protects battery terminals from shorts,Reduces the risk of battery explosion caused by sparks,Color-coded for easy polarity identification,Test hole for testing charge without removing terminal protector,Large flange covers entire lead area