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

Juniper SRX5K-40GE-SFP SRX 5000 Series 40x 1GB SFP Gateway Module

SKU: NSH-6639
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Juniper EX4650-48Y-DC-AFI 48x 25GB SFP28 8x 100GB QSFP28 B-F Airflow

SKU: NSH-8961
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Extreme EC8404003-E6 VSP 8400 Series 8408QQ 8x 40G QSFP+ Switch Module

SKU: NSN-4044
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QFX5110-48S-DC-AFO 48x 10GB SFP+ 4x 100GB QSFP28 F-B Air (DC) Switch

SKU: NSN-3623
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

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

NEW Juniper DPCE-X-40GE-SFP 40x 1GB SFP Enhanced Services DPC Module

SKU: NSN-4413
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper QFX5110-48S-DC-AFO 48x 10GB SFP+ 4x 100GB QSFP28 F-B Air (DC) Switch

SKU: NSH-8243
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW HPE JG325B 40GB BASE-SR4 850nm MPO QSFP+ Transceiver

SKU: NSN-7207
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