1.Strong compatibility:such SAE adapter connectors applied on 12V/24V DC systems to be compatible with all kinds of SAE quick connection/ disconnection extension cable plugs. 2.widely used:SAE Polarity Reverse Adapter Connectors suits for solar panel project, electrical wiring project, cars, motorcycles, light aircraft and industrial equipment. 3.strong and sturdy:The SAE adapter's plug is rugged, no wires required, straight-through,compact,plug-in switch lever.can be connected to a 12V / 24V DC system of car,The maximum current is 30A. 4.Function:to make the polarity of quick disconnect extension cable/ connectors reversed. Colour:Black Material:plastic Package Contents: 5 x SAE Polarity Reverse Adapter Connectors Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.