Your search for "sfp-1g-zx" revealed the following:

NEW Cisco GLC-ZX-SM 1GB BASE-ZX 1550nm 80km LC SMF SFP Transceiver

SKU: NSN-9336
Condition: New
Shipping: Overnight Options
Warranty: 365 days

$ 587.99

$ 612.99

• 13 in stock
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Dell SFP-1G-ZX 1GB BASE-ZX Extended-Reach 1310nm 80km SMF LC SFP Transceiver

SKU: NSB-5920
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Extreme 10053 1GB BASE-ZX 1550nm SMF SFP Transceiver

SKU: NSN-5669
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco GLC-ZX-SM-RGD 1GB BASE-ZX Extended Rugged SFP Transceiver

SKU: NSN-1390
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Extreme 10053 1GB BASE-ZX 1550nm SMF LC SFP Transceiver

SKU: NSH-3286
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Cisco GLC-ZX-SM-RGD 1GB BASE-ZX 1550nm 80km LC SMF SFP Transceiver

SKU: NSH-2114
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days