Use this cover to keep your Humminbird Helix Unit protected during transport or storage. Helix 5 and 7 covers are made of durable neoprene, while the Helix 9/10 and 12 are made of soft rubber. Imported. Available: Helix 5, Helix 7, Helix 9/10, Helix 12. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Sonar Covers.