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

Juniper QFX5110-32Q-AFO 32x 40GB QSFP+ Front-to-Back Airflow Switch

SKU: NSH-8245
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QFX5110-32Q-AFO 32x 40GB QSFP+ Front-to-Back Airflow Switch

SKU: NSN-2375
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper EX4300-32F-TAA 32x 1GB SFP 4x 10GB SFP+ 2x 40GB QSFP+ (TAA) Switch

SKU: NSH-8950
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QFX5110-32Q-DC-AFI 32x 40GB QSFP+ Back-to-Front Airflow (DC) Switch

SKU: NSN-3624
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper EX3400-24T-TAA 24x 1GB RJ45 4x 10GB SFP+ 2x 40GB QSFP+ (TAA) Switch

SKU: NSH-5026
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper EX3400-24T-TAA 24x 1GB RJ45 4x 10GB SFP+ 2x 40GB QSFP+ (TAA) Switch

SKU: NSN-3604
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco Meraki MA-QSFP-40G-LR4 40GB BASE-LR4 1310nm SMF QSFP+ Transceiver

SKU: NSN-8323
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Dell QSFP-40G-PSM4-LR 2XJHY 40GB BASE-LR4 1310nm SMF 2XJHY QSFP+ Transceiver

SKU: NSN-0835
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper DPCE-R-40GE-SFP 40x 1GB SFP Enhanced Services Router Line Card

SKU: NSN-1593
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper EX4300-32F-DC 32x 1GB SFP 4x 10GB SFP+ 2x 40GB QSFP+ F-B Air (DC) Switch

SKU: NSH-4920
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days