<http://schema.org/telephone>
"1-800-277-3458"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.discountfilterstore.com/water-filters.html?brand=US+Filter&flow_rate_range=10.0+-+20.0&life_months=6&size_advertised=5+x+2-1%2F2>