<http://schema.org/telephone>
"1-800-277-3458"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.discountfilterstore.com/undersink-filter-systems.html?brand=Filtrete&capacity_range=1%2C000+-+2%2C500&flow_rate_range=2.0+-+2.5&micron_rating_nom=5>