The MEC250-4PV-C 4-wire metal edge clip is made of stainless steel. It can be installed on a Panel thickness ranging from 0.125" to .250" (3.2mm to 6.4mm) and can accommodate up to 4 wires with a diameter range of .200" to .295" (5.1mm to 7.5mm). Use when cable orientation is parallel to the outer edge of the panel.