Made of high-quality copper, durable, long service life. Corrosion-resistance provides secure fits with clarity, natural sonic accuracy, and no distortion. Connectors ensure high stability, high-speed lossless transmission; metal housing is a wear-resistant, anti-corrosion, and solid protection. These speaker cable connectors are nice for any amp/speakers that have screw terminals. Works with audio components like a speaker, audio/video receiver, amplifier and so on. colour: gold material: copper Package Contents: 50 x Spade Adapter Plugs 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.