This is not the full C3 VacuMount Kit nor System Kit. The Kit and System Kit are sold separately.
This is an accessory to be used in conjunction with either the VacuMount Kit or System Kit. Hooks are sold in pairs.
To protect your equipment, we recommend to use tension belt and our latest developed hook system. The hooks fit almost in every gap and due to its material avoid scratches or other damages on a car, boat, etc.