<http://schema.org/telephone>
"1-800-277-3458"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.discountfilterstore.com/water-filters.html?capacity_range=1%2C000+-+2%2C500&flow_rate_range=1.5+-+2.0&micron_rating_nom=0.5>