A "spine" for your Advanced Elements inflatable kayak! Fits AE1017 Sport, AE1012 AdvancedFrame and AE1002 AirFrame series. The Backbone is inserted under your floor cushion while your kayak is deflated. Once the kayak is pumped up, the backbone creates a bow-to-stern frame which enhances performance and rigidity; while the bow-to-stern beam is straight, the side-to-side silhouette has a slight v-bottom. Four different models. Features include: Aluminum shaft with rubberized foams; Strong plastic paddles 4 to 5 pc breakdown construction - fits in the carrying case Enhances performance and rigidity Weight 3 lbs Length 79.5" Fits AE1017 Sport, AE1012 AdvancedFrame and AE1002 AirFrame series