Your search for "juniper qsfp-40g" revealed the following:

NEW Cisco N3K-C3172TQ-32T 32x 10GB Copper 6x 40GB QSFP+ Front-to-Back Air Switch

SKU: NSN-8245
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7050QX2-32S-F 32x 40GB QSFP+ 4x 10GB SFP+ F-B Airflow Switch

SKU: NSN-2435
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7280TR-48C6-F 48x 10GB Copper 6x 100GB QSFP28 F-B Airflow Switch

SKU: NSN-9773
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7050QX2-32S-R 32x 40GB QSFP+ 4x 10GB SFP+ B-F Airflow Switch

SKU: NSN-2436
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Ruckus ICX7650-48ZP-E 24x MultiGB PoH 24x 1GB PoE+ RJ45 4x QSFP+ F-B Switch

SKU: NSN-3071
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco C6800-SUP6T Catalyst 6800 Switch Supervisor Engine 6T Module

SKU: NSN-2099
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Fortinet FS-524D-FPOE 24x PoE+ RJ45 4x SFP+ 2x QSFP+ Local Management Switch

SKU: NSN-8453
Condition: New
Shipping: Overnight Options
Warranty: 365 days