About this item Great for connecting speakers with banana plugs into stereo amplifiers with RCA connectors. Made of silicone soft rubber and tinned copper wire for long-term anti-rust protection. This high-level signal banana-RCA adapter cable is not suitable for low-level signal line patch cables. Please note: The banana plugs are 4mm standard size. Although the plug may appear large, it is very elastic. Please insert it into the female seat confidently during your first use, as it will become very smooth after several uses. Package includes 2 cables (2 x RCA plugs & 4 x banana plugs). Dimensions: 36 x 0.6 x 0.4 inches.