Your search for "juniper qsfp-40g" revealed the following:
Juniper EX4650-48Y-AFI 48x 25GB SFP28 8x 100GB QSFP28 Back-to-Front Air Switch
SKU: NSH-8959
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 13,499.99
• Only 1 remaining
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NEW Juniper QFX5210-64C-AFI 64x 100GB QSFP28 B-F Airflow Switch
SKU: NSN-3635
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 5,635.99
• Only 2 remaining
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HPE JG326A 1m 40GB QSFP+ Direct Attach Copper Cable
SKU: NSB-5647
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 37.99
• Only 2 remaining
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Arista QSFP-40G-ER4 BASE-ER4 40GB SMF QSFP+ Transceiver
SKU: NSH-7544
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 2,029.99
• Only 2 remaining
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Arista QSFP-40G-SRBD 40GB BASE-BIDI 850nm BiDirectional MMF QSFP+ Transceiver
SKU: NSB-5335
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 91.99
• Only 2 remaining
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NEW Cisco FET-40G 40GB BASE-SR4 850nm MMF QSFP+ Transceiver
SKU: NSN-7739
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 31.99
• Only 2 remaining
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Arista QSFP-40G-XSR4 40GB BASE-XSR4 850nm Short Reach MMF QSFP+ Transceiver
SKU: NSB-5333
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 23.99
• 6 in stock
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Cisco QSFP-40G-SR-BD 40GB BASE-SR-BiDi 850nm Bi Directional MMF QSFP Transceiver
SKU: NSH-4101
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 59.99
• Only 2 remaining
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NEW Cisco QSFP-40G-CSR4 40GB BASE-CSR4 850nm MMF QSFP+ Transceiver
SKU: NSN-0781
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 31.99
• Only 2 remaining
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HPE JG327A 3m 40GB QSFP+ Direct Attach Copper Cable
SKU: NSB-5648
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 25.99
• 26 in stock
Call if you need more