Your search for "r0x44a" revealed the following:
HPE Aruba R0X44A CX 6400 Series 48x 25GB SFP28 Switch Line Card
SKU: NSB-6469
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 13,219.99
• Only 1 remaining
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NEW HPE Aruba R0X44A CX 6400 Series 48x 25GB SFP28 Switch Line Card
SKU: NSN-0523
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW HPE Aruba R0X26A CX 6405 Switch Chassis Bundle
SKU: NSN-8062
Condition: New
Shipping: Overnight Options
Warranty: 365 days