Your search for "osfp-400g-2fr4" revealed the following:
NEW Arista OSFP-400G-2FR4 400GBASE-2FR4 up to 2km over 2x pair duplex SMF OSFP
SKU: NSN-6700
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Arista OSFP-400G-2FR4 400GBASE-2FR4 Duplex CS SMF 2km DOM OSFP Transceiver
SKU: NSB-5212
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days