Description: 2 Pieces Test pen with 8 pieces replaceable pin. Plastic Pen, Gold plating and nickel plating pin Connect to 4mm diameter banana plug. Wonderful electronics component for testing electronics with multimeters and other instruments. Has protective cap. Color: Black + Red Length: 10cm / 4inch Package Includes: 1 Pair Multimeter Probe Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !