Features 1、High Quality Material: It is made of pure copper and gold plated material, which is sturdy and durable to ensure a long service life. 2、Stable Performance: Good transmission performance, good contact performance, pluggable, durable, easy to assemble. 3、Exquisite Craftsmanship: Pure copper gold plated connectors are made with precision craftsmanship, which can be used for a long time. 4、High Precision: The metal connector is manufactured using high precision CNC technology, exquisite and practical, wide usage. 5、Special Process: The metal connector adopts the gold plating process to prevent the product from aging and oxidation. Specification Item Type: Male and Female Butt Plug Model: 12.040, 12.041 Material: Pure Copper and Gold Plated Size: 12.040: Top Diameter: Approx. 3.5mm/0.14in 12.041: Inner Diameter: Approx. 3.5mm/0.14in Outer Diameter: Approx. 4.2mm/0.17in Purpose: Electronic Test Accessories Package List 10 x Lantern Pin (Male) 10 x Butt Connector (Female)