<https://www.avonsecurityproducts.com/product/heavy-duty-vertical-proximity-card-holder-credit-card-size-pack-of-100/#product>
<http://schema.org/description>
"Clear Flexible Vinyl Vertical Proximity Card Holder. Use With A Strap Clip That Will \"Lock-In\" A Card When Attachment Is Inserted Into Slot. Top Load with Slot &amp;amp; Chain Holes. \r\n\r\nInsert Size: 2.125\" x 3.375\"\r\n\r\nEquivalent SKU: ASP-153188"
<https://www.avonsecurityproducts.com/product/heavy-duty-vertical-proximity-card-holder-credit-card-size-pack-of-100/>