Your search for "pwr-500-dc-f" revealed the following:
Arista DCS-7050TX-72-R 48x 10GB Copper 6x 40GB (2x MXP) B-to-F Airflow Switch
SKU: NSH-7465
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7060CX2-32S-R HPE JH977A 32x 100GB QSFP 2x 10GB SFP+ B-F Switch
SKU: NSN-3590
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SE-72-R 48x 10GB SFP+ 2x 100GB MXP Back-to-Front Air Switch
SKU: NSN-2449
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
NEW Arista DCS-7280SE-64-F 48x 10GB SFP+ 4x 40GB QSFP+ Front-to-Back Air Switch
SKU: NSN-2462
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Arista DCS-7280SR3K-48YC8-F 48x 25GB SFP28 8x 100GB QSFP28 F-B Air Switch Router
SKU: NSB-9427
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7050SX2-72Q-R 48x 10GB SFP+ 6x 40GB QSFP+ B-F Airflow Switch
SKU: NSN-2394
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SE-68-F 48x 10GB SFP+ 2x 100GB QSFP100 F-B Airflow Switch
SKU: NSN-1667
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7280SE-64-R 48x 10GB SFP+ 4x 40GB QSFP+ Back-to-Front Air Switch
SKU: NSN-0084
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Arista DCS-7280TRA-48C6-R 48x 10GB RJ45 6x 100GB QSFP28 AM B-F Switch Router
SKU: NSB-5389
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days