Compatible With HELIX 9 MSI GPS G4N, HELIX 9 MSI GPS G3N, HELIX 9 MDI GPS G4N, HELIX 9 MDI GPS G3N, HELIX 9 CHIRP GPS G4N, HELIX 9 CHIRP GPS G3N, HELIX 8 MSI GPS G4N, HELIX 8 MSI GPS G3N, HELIX 8 MDI GPS G4N, HELIX 8 MDI GPS G3N, HELIX 8 CHIRP GPS G4N, HELIX 8 CHIRP GPS G3N; Silver; Stainless Steel; With Bracket And Hardware; For Mounting In High-Vibration Environments