Premium PET/PVC 4428 chip blank contact sensing card with 125kHz frequency for seamless access control integration. High-durability composite material ensures long-term reliability in harsh environments while maintaining flexible card structure. Custom laser engraving technology allows crisp corporate branding or individualized designs without compromising RFID performance. Ideal for hotel keycards, employee badges, secure facility access, and membership systems requiring encrypted proximity authentication. Bulk pricing available for enterprise deployments with wholesale volume discounts. Compatible with most standard 125kHz RFID readers for plug-and-play installation.