StarTech.com Serial & Parallel Port Low & Full PC Backplates with Header Cable - StarTech.com PLATE9MLP, The StarTech.com PLATE9MLP 230mm 9-pin Serial Low Profile Backplate adds 1 x DB9 serial port to the rear panel of a small form factor/low profile computer, connecting to an IDC10 header on the motherboard. Please refer to your motherboard\'s technical specifications to ensure compatibility with this product.Backed by StarTech.com\'s lifetime warranty. StarTech PLATE9MLP 230mm 10-pin Header to 9-pin Serial Low Profile Backplate