Your search for "juniper qsfp-40g" revealed the following:
Juniper QFX5110-48S-AFI 48x 10GB SFP+ 4x 100GB QSFP28 Back-to-Front Air Switch
SKU: NSH-8240
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper DPCE-R-40GE-SFP 40x 1GB SFP Enhanced Services Router Line Card
SKU: NSN-1593
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper EX3400-48P-TAA 48x 1GB PoE+ RJ-45 4x 10GB SFP+ 2x QSFP+ (TAA) Switch
SKU: NSH-8946
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper PTX10001-20C-AO PTX Series 20x 100 Gigabit QSFP28 Router
SKU: NSH-9733
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5110-48S-DC-AFI 48x 10GB SFP+ 4x 100GB QSFP28 B-F Airflow (DC) Switch
SKU: NSH-8242
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper EX9251-8X4C EX9250 Series 8x 10GB SFP+ 4x 100GB QSFP28 Switch
SKU: NSN-3533
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper EX4650-48Y-AFI 48x 25GB SFP28 8x 100GB QSFP28 B-F Air Switch
SKU: NSN-3465
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5110-48S-AFI 48x 10GB SFP+ 4x 100GB QSFP28 B-F Airflow Switch
SKU: NSN-3749
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper SRX5K-40GE-SFP SRX5000 Series 40x 1GB SFP Gateway Module
SKU: NSN-5142
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Ipolex CAB-QSFP/QSFP-P5M 5m 40GB QSFP+ Direct Attach Copper Cable
SKU: NSB-1005
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days