Your search for "sfp-10g-dz-t" revealed the following:
Arista SFP-10G-DZ-T 10GB BASE-DWDM Duplex SMF Tunable SFP+ Transceiver
SKU: NSB-5373
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista SFP-10G-DZ-T 10GB BASE-DWDM Duplex SMF Tunable SFP+ Transceiver
SKU: NSN-5308
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Arista SFP-10G-DZ-T 10GB BASE-DWDM Tunable SFP+ Transceiver
SKU: NSB-7190
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days