This part number does not exist as a standalone product. ASA5506-K9 is a Cisco firewall appliance; the "-24X7X4" suffix refers to a Cisco SMARTnet support contract option (24/7 support with 4-hour hardware replacement), not a distinct manufactured product.
Specification
Manufacturer: Cisco (not Interactive)
Product Type: Firewall appliance with optional support contract
Note: Part number appears to conflate hardware (ASA5506-K9) with service contract term (-24X7X4)
