Durable Material: Crafted from flexible vinyl, ensuring longevity and resistance to daily wear and tear Perfect Fit: Measures 2.3" x 4.25" to accommodate standard ID cards Easy Access: Slot goes through front and back for quick card insertion and removal Secure Hold: Compatible with strap clip to 'lock' in your card, preventing loss Versatile Use: Ideal for ID cards, badges, or access cards Brady People Id, 504-NCS, S-Series 2.3" x 4.25" Vertical Flexible Proximity Card Holder S-Series Clear Soft Flexible Vinyl Vertical Proximity Card Holder. Slot goest through front and back of holder. Use with a strap clip to "lock" in your card.