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

Juniper QSFPP-40GBASE-ER4 40GB BASE-ER4 1310nm SMF 40km QSFP+ Transceiver

SKU: NSB-3530
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper PTX10K-LC1102 PTX 10000 Series 36x 40G QSFP+ Router Line Card

SKU: NSN-4158
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper JNP-QSFP-DAC-5MA 5m 40GB QSFP+ Direct Attach Copper Cable

SKU: NSN-8045
Condition: New
Shipping: Overnight Options
Warranty: 365 days

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

SKU: NSN-4678
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QSFPP-4X10GE-SR 40GB BASE SR 850nm Short Reach MMF QSFP+ Transceiver

SKU: NSN-6976
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper PTX10K-LC1102 PTX 10000 Series 36x 40G QSFP+ Router Line Card

SKU: NSH-9741
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper JNP-QSFP-4X10GE-IR 40GB BASE-LR4 1310nm SMF QSFP+ Transceiver

SKU: NSN-6362
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper JNP-QSFP-DAC-10MA 10m 40GB QSFP+ Direct Attach Copper Cable

SKU: NSB-5064
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper JNP-QSFP-DAC-10MA 10m 40GB QSFP+ Direct Attach Copper Cable

SKU: NSN-9078
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper QFX5100-24Q-AA-AFO 24x 40GB QSFP+ 1x DW Slot Front-to-Back Air Switch

SKU: NSH-8233
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days