Your search for "MA-INJ-5-US" revealed the following:
Cisco Meraki ANT-10 5/7 dBi Dual Band Omni Antenna
SKU: NSB-3582
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki ANT-10 5/7 dBi Dual Band Omni Antenna
SKU: NSN-9038
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MG21E-HW-NA CAT 6 LTE Gateway External Antennas Unclaimed
SKU: NSN-0081
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MR86-HW Wi-Fi 6 External Ant Unclaimed Outdoor WAP w/ Mounts
SKU: NSN-9402
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco Meraki MG21E-HW-NA CAT 6 LTE Cellular Gateway External Antennas Unclaimed
SKU: NSB-7453
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days