Your search for "E40G-QSFP-SR4" revealed the following:
Ruckus E40G-QSFP-SR4 40GB BASE-SR4 850nm OM3 MMF QSFP+ Transceiver
SKU: NSB-1450
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 69.99
• Only 2 remaining
Call if you need more
NEW Ruckus E40G-QSFP-SR4 40GB BASE-SR4 850nm OM3 MMF QSFP+ Transceiver
SKU: NSN-8473
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 75.99
• Only 2 remaining
Call if you need more
NEW Ruckus E40G-QSFP-SR4-INT 40GB BASE-SR4 850nm OM3 MMF QSFP+ Transceiver
SKU: NSN-1020
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Ruckus E40G-QSFP-SR4-INT 40GB BASE-SR4 850nm OM3 MMF QSFP+ Transceiver
SKU: NSB-1453
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days