Features 1、Stable Transmission: The 4mm test adapter has good transmission performance, good contact performance, plug in resistance and durability. 2、High Accuracy: The 4mm test adapter is manufactured using high accuracy CNC technology with high accuracy. 3、Quality Material: Zinc alloy + manganese steel + ABS material is used to prevent the product from aging and oxidation. 4、Update Replacement: Can be used to replace old or damaged old parts, professional manufacturing, no need to worry about mismatch. 5、Practicality: This banana connector has good working performance, strong practicability, and can be used in electronic instruments. Specification Item Type: 4.0mm Test Adapter Model: 22.090 Material: Zinc Alloy, Manganese Steel, ABS Purpose: For Electronic Equipment Basic Parameters: Package List 10 x Test Adapter ( Red) 10 x Test Adapter ( Black)