Features: M4x28 banana plug test panel insulation wiring terminal banana female head hole Product material: PA plastic + copper with nuts, firmly fixed and not easy to loosen Commonly used as a power outlet output for testing equipment, compatible with 4mm non-insulated banana plugs Ideal for connecting satellites and center speakers to AV receivers Main copper construction is wear-resistant, with excellent conductivity and low oxidation resistance, ensuring stable current transmission Specifications: Power: 30-60VDC / maximum 24A Size: approx 10.5 x 2.8 cm / 4.13 x 1.1 in Color: White / Yellow / Green / Blue / Red / Black Product Material: PA Plastic + Copper with Nuts Quantity: 12 pcs Note: There might be slight color variations due to different screen resolutions There might be minor size differences due to manual measurement Package includes: 12 pcs