Your search for "pwr-500-dc-f" revealed the following:
NEW Arista DCS-7050TX-64-F 48x 10GB Copper 4x 40GB QSFP+ F-B Air Switch
SKU: NSN-2504
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-7060CX-32S-F HPE JH576A 32x 100GB QSFP 2x 10GB SFP+ F-B Switch
SKU: NSN-2424
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-7020SR-24C2-R 24x 10GB SFP+ 2x 100GB QSFP B-F Air Switch
SKU: NSN-4912
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050SX-72-F 48x 10GB SFP+ 2x MXP Front-to-Back Airflow Switch
SKU: NSN-2475
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-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-7280TR-48C6-R 48x 10GB Copper 6x 100GB QSFP28 B-F Airflow Switch
SKU: NSN-3567
Condition: New
Shipping: Overnight Options
Warranty: 365 days