Your search for "juniper qsfp-40g" revealed the following:
Juniper QFX-PFA-4Q QFX Series 4x 40GB QSFP+ Packet Flow Accelerator Module
SKU: NSH-9445
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
Juniper QFX5100-24Q-AA-AFI 24x 40GB QSFP+ 1x DW Slot Back-to-Front Air Switch
SKU: NSH-8216
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 JNP-QSFP-DACBO-7MA 7m 40GB QSFP+ to 4x 10GB SFP+ DA Breakout Cable
SKU: NSB-5063
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper EX4300-48T-DC-AFI 48x 1GB RJ45 4x 40GB QSFP+ B-F Air (DC) Switch
SKU: NSN-2577
Condition: New
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
Juniper QFX5100-48T-DC-AFI 48x MultiGB RJ-45 6x 40GB QSFP+ B-F Air (DC) Switch
SKU: NSH-8212
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper EX4300-32F 32x 1GB SFP 4x 10GB SFP+ 2x 40GB QSFP+ F-B Airflow Switch
SKU: NSH-4919
Condition: Seller refurbished
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