Your search for "cfp-100g-er4" revealed the following:
NEW Cisco CFP-100G-ER4 100GB BASE-ER4 1310nm SMF CFP Transceiver
SKU: NSN-3591
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 8,912.99
• Only 2 remaining
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Cisco CFP2-100G-ER4 100Ğ BASE-ER4 1310nm 40km DOM CFP2 Transceiver
SKU: NSB-2465
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 6,187.99
• Only 2 remaining
Call if you need more
Juniper CFP-100GBASE-ER4 100GB BASE-ER4 1550nm SMF LC CFP Transceiver
SKU: NSH-8302
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper CFP-100GBASE-ER4 100GB BASE-ER4 1550nm SMF LC CFP Transceiver
SKU: NSN-2412
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper CFP-GEN2-CGE-ER4 100GB BASE-ER4 2nd Gen CFP Transceiver
SKU: NSB-5502
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper CFP-GEN2-CGE-ER4 100GB BASE-ER4 2nd Gen CFP Transceiver
SKU: NSN-5462
Condition: New
Shipping: Overnight Options
Warranty: 365 days