Straight from the Harley Davidson world comes the Flush Mount Gas Cap. The best and last gas cap you will ever own. Flows with the line of your Triumph, Thruxton, Triumph Bonneville, or Triumph Scrambler Gas Tank. No tools required, installation is a simple as removing your stock gas cap and screwing in the flush mount gas cap. Features: – Flush mount design blends with line of your gas tank – Pop up knurled knob for easy removal – Vented to ensure proper gas flow.