Your search for "MSN4600-CS" revealed the following:
Mellanox MSN4600-CS2F 64x 100GB QSFP28 Back-to-Front Airflow (P2C) Onyx Switch
SKU: NSB-6707
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 11,244.99
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Nvidia Mellanox MSN4600-CS2FO 64x 100GB QSFP28 B-F Airflow (P2C) ONIE Switch
SKU: NSB-6711
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Nvidia Mellanox MSN4600-CS2FC 64x 100GB QSFP28 B-F Air P2C Cumulus Linux Switch
SKU: NSB-6709
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days