<http://schema.org/telephone>
"1-800-277-3458"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.discountfilterstore.com/omni-filters.html?capacity_range=500+-+1%2C000&flow_rate_range=0.5+-+1.0&price=20-&size_advertised=2-1%2F10+x+2>