Your search for "Juniper QSFP-40G" revealed the following:
Juniper JNP-QSFP-DAC-7MA 7m 40GB QSFP+ Direct Attach Copper Cable
SKU: NSB-5065
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper JNP-QSFP-DAC-2M 2m 40GB QSFP+ Direct Attach Copper Cable
SKU: NSB-5069
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper EX4600-40F-DC-AFI 24x 10GB SFP+ 4x 40GB QSFP+ B-F Air (DC) Switch
SKU: NSN-3900
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper EX4300-48T-AFI-TAA 48x 1GB RJ45 4x 40GB QSFP+ B-F Air (TAA) Switch
SKU: NSN-3463
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper MPC5E-40G10G 24x 10GB SFP+ 6x 40GB QSFP+ Router Line Card
SKU: NSN-2376
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper EX4600-40F-DC-AFO 24x 10GB SFP+ 4x 40GB QSFP+ F-B Air (DC) Switch
SKU: NSN-3899
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper MPC5EQ-40G10G-IRB MX Series 6x 40GB QSFP+ Router Line Card
SKU: NSH-8695
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-24Q-3AFI 24x 40GB QSFP+ 2x Mod Slot Back-to-Front Air Switch
SKU: NSN-2302
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
Juniper EX4600-40F-DC-AFO 24x 10GB SFP+ 4x 40GB QSFP+ F-B Airflow (DC) Switch
SKU: NSH-8264
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days