1、High Bearing: 4mm 7 pin banana plug can bear 32A high current and 1000V voltage, which is capable for home and office use, the set 10 sleeves for 5 colors. 2、Copper Contact Part: Contact parts is made of pure copper and nickel plated, with little transmission loss and not easy to oxidize. 3、Flame Retardant Sheath: These PVC non slip insulating sheath has a certain flame retardant, can keep you safe during work. 4、Strong Material: Made of PVC and copper material, has good transmission performance, good contact performance, and high resistance to plug. 5、Screw Connection: Use screws to connect, no need for welding, the tail of the screw wire also allows cable welding, plug side can even pole interplug. Item Type: 4mm Banana Plug Contact Material: Pure Copper, Copper Plated Nickel Insulation Material: PVC Color: Red, Black, Blue, Yellow, Green Application: For Audio Cable For Speaker, TV, Computer, Etc. Product Size: Plug Length: Approx.61mm/2.4in Weight: Approx.70g/2.5oz Maximum Wiring Diameter: 3.5mm/0.14in Maximum Current: 32A Withstand Voltage: 1000 V Connection: Screw Connection 10 x Connector 2 x Red Sleeve 2 x Black Sleeve 2 x Blue Sleeve 2 x Yellow Sleeve 2 x Green Sleeve