Item Type: Electronic Connector Set Model: 12.040, 12.041 Material: Pure Copper with Gold Plating 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 - High-Quality Material: Made of pure copper with gold plating for durability and extended service life. - Stable Performance: Ensures reliable transmission and contact, designed for repeated plugging and easy assembly. - Precision Craftsmanship: Connectors crafted with precision for long-term use. - High Precision Manufacturing: Produced using CNC technology for accuracy and reliability. - Gold Plating Process: Provides resistance to oxidation and aging. Avoid prolonged exposure to corrosive gases or liquids to maintain performance. Package Includes: 10 x Lantern Pin (Male) 10 x Butt Connector (Female)