<http://schema.org/telephone>
"1-800-277-3458"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.discountfilterstore.com/tier1-filters.html?manufacturer_pool_spa=Tier1&price=30-40&size_pool_spa_diameter_range=9+and+up&size_pool_spa_length_range=6+-+9>