The 2 or 4 conductor centre terminal block with fixing flanges from Ningbo Supu Electronics uses the spring clipping technology. It operates easily, and only needs a screw driver for installing. It is reliable, shock resistant, and maintenance-free. As it is mounted on SP35 standard rail (steel or aluminum), the terminal block is good for tight spaces. The wire range is from 0.2-2.5mm²/24-14AWG. It meets the requirements of IEC, UL, CSA and EN. The size (mm/in) is 10×32×24.5 mm/0.394×1.26×0.96 in, it is a front-entry wiring type, and is available in the colors gray, blue, orange, green and green-yellow.