Low profile pop-up design, to replace the standard screw-in fuel cap. Installs with a screw-in insert that mounts in the tank. In this the pop-up gas cap is installed to allow a flush mount, super low profile. The trim ring is self-adhesive and give the finished touch. To open cap, just push for the filler cap to come up and screw filler cap open. Gives a good grip so works with or without gloves. Set includes insert, gas cap and trim ring.