Twin Air Complete Air Filter Maintenance Kit. The Twin Air Complete Air Filter Maintenance Kit is all you need to keep your Twin Air filter in prime condition. The kit comes with a 1L can of Liquid Power filter oil, a 4L can of Liquid Dirt Remover filter cleaner, and includes both a cleaning tub (with cage) and an oiling tub. You’ll also get a 500ml aerosol can of Twin Air Contact Cleaner. We will accept your request at our earliest opportunity. This includes Republic Of Ireland. Please do not ask us to lower the value of goods this is illegal and we do not want to get involved in this kind of activity.