<http://schema.org/sku>
"PUNK-I7P-LD2-746"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.punkcase.com/products/iphone-7-plus-case-punkcase-lucid-2-0-purple-series-for-apple-iphone-7-plus-slim-slick-frame-lifetime-warranty-exchange>