Check the listing for details. Universal Pack(20) Battery Terminal Boots Insulating Rubber Covers Cable Lug. Condition: New. Listed at 12.49 USD. Feature:High temperature resistant PVC structure, the stable temperature is 105℃.Comes in red and black, which can be used to distinguish polarities. Use red for positive and black for negative.Ability to protect generators and electrical systems from short circuits and corrosion.Reduce the risk of accidental battery explosion due to sparks.Protects cables, segments, and connectors from grease and debris, and dust ingress.Description：Material: RubberColor: Black, RedDimension 1: 21x14x34mm / 0.83"x0.55"x1.34"(L*W*H)Hole Diameter 1: 11mm / 0.43", 2.5mm / 0.10"Dimension 2: 30x22x47mm / 1.18"x0.87"x1.85"(L*W*H)Hole Diameter 2: 20mm / 0.79", 12mm / 0.47"Quantity: 20 pieces in all, 10 units in red and 10 units in black.Uses: Black and Red Battery Insulating SleevesPackage Include: 20 Pcs Black Red Battery Insulation Cover.