Your search for "pwr-500-dc-f" revealed the following:
NEW Arista DCS-7280TRA-48C6-R 48x10G RJ45 6x100G QSFP AlgoMatch RF Switch Router
SKU: NSN-6781
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SR-48C6-M-R 48x 10GB SFP+ 6x 100GB QSFP28 B-F Airflow Switch
SKU: NSN-0397
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280TR-48C6-F 48x 10GB Copper 6x 100GB QSFP28 F-B Airflow Switch
SKU: NSN-9773
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SE-68-R 48x 10GB SFP+ 2x 100GB QSFP100 B-F Airflow Switch
SKU: NSN-3814
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SR-48C6-M-F 48x 10GB SFP+ 6x 100GB QSFP F-B Airflow Switch
SKU: NSN-2365
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050QX2-32S-R 32x 40GB QSFP+ 4x 10GB SFP+ B-F Airflow Switch
SKU: NSN-2436
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SRA-48C6-R 48x 10G SFP+ 6x 100G QSFP B-F Air Switch
SKU: NSN-4308
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050TX-72-R 48x 10GB Copper 6x 40GB (2x MXP) B-F Airflow Switch
SKU: NSN-6526
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050CX3-32S-R 32x 100GB QSFP100 2x 10GB SFP+ B-F Air Switch
SKU: NSN-3614
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SE-72-F 48x 10GB SFP+ 2x 100GB MXP Front-to-Back Air Switch
SKU: NSN-2427
Condition: New
Shipping: Overnight Options
Warranty: 365 days