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