Two types: 1) Standard type: with entry ports, most popularly used 2) Assembly type: cable array on demands of clients Features: 1) Including galvanized steel entry panel, stainless steel clamps, entry ports, rubber boot and insert plug 2) Panel with 4" or 5" entry ports, types such as 1 port, 2, 3, 4, 6, 8, 9, 12, 16, 18, and 24 ports 3) Holes in the port, according to size of installation ...