Notice : Internal USB 3.0 Header is a 20Pin header using the standard IDC pin numbering, and one pin has pulled out to prevent dullness, so it's also called 19Pin. Both headers of this item are 19Pin Female, please check the images and ensure they fit your devices. Description : Connector A : Motherboard USB 3.0 Header 19Pin Female Connector B : Motherboard USB 3.0 Header 19Pin Female Color : Blue Length : Approx. 50cm Package Content : 1pcs Female to Female USB 3.0 Motherboard Cable