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 cables 4) For extra port or holes, use port cap and insert plug, for airproofing 5) Suitable for all types of cables