Printer Adapter, LPT Plug, IEEE 1284 Cable. Flat Vector Icon illustration. Simple black symbol on white background. Printer Adapter, LPT Plug Cable sign design template for web and mobile UI element. Printer Adapter, LPT Plug, IEEE 1284 Cable. Flat Vector Icon illustration. Simple black symbol on white background. Printer Adapter, LPT Plug Cable sign design template for web and mobile UI element.