HIGH QUALITY: The terminal block is made of high-quality copper guide plate with nickel-plated surface, offering good conductivity, strong corrosion resistance, and resistance to oxidation. It is rust-proof and durable. The shell is constructed from insulating plastic. Red and Black Insulated Terminal Barrier Strips: Features a PVC insulation sheath for non-slip and anti-shock performance. Copper is tinned to prevent oxidation. Center spacing is precise to ensure secure connections that do not come loose. Can be cut to size. GOOD PERFORMANCE: These double-row screw terminal strips help connect bare wires neatly, reducing clutter. Jumpers allow for organized signal or power distribution, making wiring simpler and more efficient. EASY TO USE: Terminal strips are easy to install and can be secured using two screw holes located at each end. One mounting hole on each end allows for fixed installation. The fork terminal strip can be cut at any position to meet specific requirements.