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This internal extension cord features a 19Pin male plug for connecting to motherboard onboard USB3.0 header and an outward-orientated female port reserved for chassis front panel mounting. It effectively extends built-in mainboard USB3.0 interface outward to PC front shell, solving port position mismatch during case upgrade or replacement. Built per official USB3.0 specification to guarantee stable 5Gbps file transmission and normal power supply for connected USB gadgets. Premium insulated outer layer resists abrasion and high temperature inside computer cabinet, widely applicable for ATX, MATX and ITX mainstream desktop builds.