Your search for "Juniper QSFP-40G" revealed the following:
Arista AOC-Q-Q-40G-25M 25m 40GB QSFP+ Active Optical Cable
SKU: NSB-5308
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper JNP-100G-4X25G-1M 1m 100 GB QSFP28 to 4x 25GB SFP+ Breakout Cable
SKU: NSH-9697
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Fiberstore QSFP-40G-AOC 5m 40GB QSFP+ Active Optical Cable
SKU: NSB-5304
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5200-48Y-AFO 48x 25GB SFP28 6x 100GB QSFP28 F-B Air Switch
SKU: NSH-8257
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5210-64C-DC-AFI 64x 100GB QSFP28 B-F Airflow (DC) Switch
SKU: NSH-8262
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5120-48Y-DC-AFO 48x 25GB SFP+ 8x 100GB QSFP28 F-B Air (DC) Switch
SKU: NSN-3629
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell AFBR-79EBMZ-FT1 40GB BASE-SR MMF XW7J0 QSFP-40G-BIDI QSFP+ Transceiver
SKU: NSB-5947
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5200-32C-DC-AFI 32x 100GB QSFP28 Back-to-Front Air (DC) Switch
SKU: NSN-3630
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Extreme 48051 ExtremeSwitching X8 BDXA-40G24X 24x 40G QSFP+ Switch Module
SKU: NSN-3829
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5200-48Y-DC-AFO 48x 25GB SFP28 6x 100GB QSFP28 F-B Air (DC) Switch
SKU: NSH-8259
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days