Your search for "PWR-500-DC-F" revealed the following:

NEW Arista DCS-7124SX-F 7100 Series 24x 10GB SFP+ Front-to-Back Airflow Switch

SKU: NSN-3288
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7050QX-32S-R 32x 40GB QSFP+ 4x 10GB SFP+ Back-to-Front Air Switch

SKU: NSN-1736
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7050SX3-48YC12-F 48x 25GB SFP28 12x 100GB QSFP100 F-B Air Switch

SKU: NSN-3615
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7020SR-24C2-R 24x 10GB SFP+ 2x 100GB QSFP B-F Air Switch

SKU: NSN-4912
Condition: New
Shipping: Overnight Options
Warranty: 365 days
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NEW Arista DCS-7050SX-72Q-R 48x 10GB SFP+ 6x 40GB QSFP+ Back-to-Front Air Switch

SKU: NSN-4910
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7050SX-72-R 48x 10GB SFP+ 2x MXP Back-to-Front Airflow Switch

SKU: NSN-2476
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7280SR-48C6-R 48x 10GB SFP+ 6x 100GB QSFP B-F Airflow Switch

SKU: NSN-1838
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7280TR-48C6-R 48x 10GB Copper 6x 100GB QSFP28 B-F Airflow Switch

SKU: NSN-3567
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7280SRA-48C6-F 7280R 48x 10G SFP+ 6x 100G QSFP F-B Air Switch

SKU: NSN-4309
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7050TX-48-R 32x 10GB Copper 4x 40GB QSFP+ B-F Airflow Switch

SKU: NSN-1927
Condition: New
Shipping: Overnight Options
Warranty: 365 days