Your search for "Juniper QSFP-40G" revealed the following:
Juniper JNP-QSFP-100G-LR4 100GB BASE-LR4 1310nm SMF QSFP28 Transceiver
SKU: NSH-5855
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 133.99
• Only 2 remaining
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Cisco QSFP-40G-LR4 40GB BASE-LR4 1310nm SMF LC QSFP Transceiver
SKU: NSH-3659
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 126.99
• Only 2 remaining
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Cisco QSFP-40G-LR4-S 40GB BASE-LR4 1310nm SMF LC QSFP Transceiver
SKU: NSH-6814
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 106.99
• Only 2 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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Juniper EX4500-40F-VC1-FB 40x 10GB SFP+ 2x Mod Slot Front-to-Back Airflow Switch
SKU: NSH-6624
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 225.99
• Only 2 remaining
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NEW Arista QSFP-40G-XSR4 40GB BASE-XSR4 850nm Short Reach MMF QSFP+ Transceiver
SKU: NSN-3845
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 76.99
• Only 2 remaining
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Arista QSFP-40G-LR4 BASE-LR4 40GB 1310nm Long Reach SMF LC QSFP+ Transceiver
SKU: NSH-7515
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 119.99
• Only 1 remaining
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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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Cisco QSFP-40G-SR4 40GB BASE-SR4 850nm MMF MPO-12 QSFP+ Transceiver
SKU: NSH-7992
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 22.99
• Only 2 remaining
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Cisco QSFP-40G-SR4-S 40GB BASE-SR4 850nm MMF QSFP+ Transceiver
SKU: NSH-5558
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 22.99
• 26 in stock
Call if you need more