<http://schema.org/telephone>
"1-800-277-3458"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.discountfilterstore.com/omni-filters.html?amp%3Bflow_rate_range=5.0+-+10.0&capacity_range=10%2C000+-+25%2C000&life_months=6>