Features 1、Easy to Distinguish: Color coded black/red rings for maintaining proper polarity secure, positive contact with binding posts 2、Excellent Isulated Performance: The gold plated speaker plugs has good insulation resistance, effectively prevent electric leakage. 3、Excellent Material: Good transmission performance, good contact performance, durable plug out. 4、Features: The closed screw type has the characteristics of insulation, fire retardant and heat resistant to deformation 5、Practical Accessories: When connecting devices, taking away the hassle of crimping or soldering. Specification Item Type: 4.0mm Banana Plugs Material: Red Copper, ABS Model: 24.320 Purpose: For Electronic Instruments Basic Parameters: Inner Diameter of Jack: φ4.00mm/0.16in Thread: M4 Package List 5 x Banana Plugs (Red) 5 x Banana Plugs (Black)