Your search for "Juniper QSFP-40G" revealed the following:

NEW Juniper QFX5120-48Y-DC-AFI 48x 25GB SFP+ 8x 100GB QSFP28 B-F Air (DC) Switch

SKU: NSN-3628
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QFX5220-32CD-AFO 32x 400GB QSFP56-DD Front-to-Back Airflow Switch

SKU: NSN-0931
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Arista AOC-Q-Q-40G-20M 20m 40GB QSFP+ Active Optical Cable

SKU: NSB-5307
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco N9K-X9636PQ 36x 40GB QSFP+ Switch Line Card

SKU: NSN-7503
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista AOC-Q-Q-40G-5M 5m 40GB QSFP+ Active Optical Cable

SKU: NSN-6091
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper QFX10000-30C-M QFX 10000 Series 30x 100GB QSFP28 MACsec Switch Line Card

SKU: NSH-9971
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Arista AOC-Q-Q-40G-3M 3m 40 Gigabit QSFP+ Active Optical Cable

SKU: NSN-6064
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Arista AOC-Q-Q-40G-3M 3m 40GB QSFP+ Active Optical Cable

SKU: NSB-5303
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Dell QSFP-40G-ER4 40GB BASE-ER4 Extended-Reach 40km SMF LC QSFP+ Transceiver

SKU: NSB-5955
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Ipolex CAB-QSFP/QSFP-P5M 5m 40GB QSFP+ Direct Attach Copper Cable

SKU: NSB-1005
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days