Your search for "juniper qsfp-40g" revealed the following:
Juniper EX3400-48T-TAA 48x 1GB RJ45 4x 1GB SFP+ 2x 40GB QSFP+ (TAA) Switch
SKU: NSH-8745
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-24Q-DC-AFO 24x 40GB QSFP+ 2x Mod Slots F-B Air (DC) Switch
SKU: NSN-3903
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-48S-DC-AFO 48x 10GB SFP+ 6x 40GB QSFP+ F-B Air (DC) Switch
SKU: NSN-1570
Condition: New
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
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 EX4300-24T-TAA 24x 1GB RJ45 4x 40GB QSFP+ F-B Air (TAA) Switch
SKU: NSN-3925
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-24Q-D-3AFO 24x 40GB QSFP+ 2x Mod Slots F-B Air (DC) Switch
SKU: NSN-3779
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper MPC5E-40G10G-IRB MX2000 Series 6x 40GB QSFP+ 24x 10GB SFP+ Line Card
SKU: NSH-8689
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
NEW Juniper EX4300-48P-TAA 48x 1GB PoE+ RJ-45 4x 40GB QSFP+ F-B Air (TAA) Switch
SKU: NSN-3704
Condition: New
Shipping: Overnight Options
Warranty: 365 days