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

NEW Juniper QFX5100-24Q-DC-AFI 24x 40GB QSFP+ 2x Mod Slots B-F Air (DC) Switch

SKU: NSN-3902
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QFX3008-SF16Q QFX Series 16x 40GB QSFP+ Switch Module

SKU: NSN-8676
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper EX9200-6QS 6x 40GB QSFP+ Switch Line Card

SKU: NSN-3884
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper ACX5048-AC-L2-L3 ACX 5000 48x 10GB SFP+ 6x 40GB QSFP+ Router

SKU: NSH-2117
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Juniper EX4300-48T-DC 48x 1GB RJ-45 4x 40GB QSFP+ F-B Airflow (DC) Switch

SKU: NSH-4915
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper EX3400-48T-TAA 48x 1GB RJ45 4x 1GB SFP+ 2x 40GB QSFP+ (TAA) Switch

SKU: NSN-3699
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper EX4300-48T-DC-TAA 48x 1GB RJ45 4x 40GB QSFP+ F-B Airflow DC Switch

SKU: NSH-8953
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper EX-UM-2QSFP-MR EX4300 Series 2x 40GB QSFP+ Switch Module

SKU: NSN-4692
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper EX4300-48T-DC-AFI 48x 1GB RJ-45 4x 40GB QSFP+ B-F Airflow (DC) Switch

SKU: NSH-4918
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Juniper EX4300-24T-TAA 24x 1GB RJ-45 4x 40GB QSFP+ F-B Air (TAA) Switch

SKU: NSH-8948
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days