1High Quallity Material: Spade plug is made of red copper and PA material, high strength, anti aging, sturdy and durable. 2Standard Size: Fork wire connector tail is 4mm jack, can be connected to all 4mm sheathed plug or non sheathed 4mm jack. 3Excellent Performance: U type electrical crimp terminal with excellent electrical performance, stable and reliable. 4Easy Installation: Easy to install, just plug and play, no complex operation is required, convenient for using. 5Wide Appliation: Fork spade wire connectors are suitable for testing and multimeter, electronic applications. Item Type: ForkWireConnector Material: Red copper, PAPurpose: Suitable for testing and multimeter, electronic applications Rated Voltage/Current: 30Vac-60Vdc/Maximum.36A Connection Mode: Switch U Type Insert Opening Size: Approx. 4mm/0.16in Jack Diameter: 4mm 10 x ForkWireConnector