The EUX70SD attaches to the cooling air emissions vent on the upper rear of the EU7000is and EU6500is. If you have already purchased our EUX70GP combustion exhaust or have devised your own and simply need to exhaust the heated cooling air to prevent recirculation and overheating of your generator, the EUX70SD comes with the attaching hardware and five inch diameter by 32 inch long aluminum flex tube with worm clamp. Also consider the 5GDV for attaching the flex tube to the exterior wall.