Features: M4x28 banana plug test seatpanel insulation wiring terminal banana female head hole Product material: PAplastic+copper with nuts, firmly fixed and not easy to loosen. Usually used as a power outlet output for testing and testing equipment suitable for 4mm non insulated banana plugs; Perfect for connecting satellites and center speakersto AVreceivers The maincopper is wear-resistant, with strong conductivity and low oxidation resistance, ensuring stable current transmission Specifications: Power: 30-60VDC/maximum24A Size:approx 10.5x2.8cm/4.13x1.1in Color:White/ Yellow/ Green/ Blue/ Red/ Black Product Material: PAPlastic+Copper With Nuts Quantity: 12pcs Note: There might be a bit color distortions due to different computer resolutions. There might be size errors due to different computer resolutions. Package includes: 12PCS