don't forget the approximate $47 gst you have to pay to customs when it comes into the country, and also you may be liable for an import entry transaction fee of around $38, . so add around $85 to the total, and they have the right to hold it until you have paid them (plus a bit longer for red tape)
and if you annoy them enough they might even fumigate it for you, not the best idea for a filter.
ime importing is not as easy as it seems, and they seem to be tightening up a bit