Your search for "MTEF" revealed the following:

NEW Nvidia Mellanox MC2210411-SR4E 40GB BASE-SR4 850nm MMF QSFP+ Transceiver

SKU: NSN-8601
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Extreme 10051H 1GB BASE-SX 850nm MMF LC SFP Transceiver

SKU: NSN-7132
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper EX-SFP-10GE-LRM 10GB BASE-LRM 1310nm LC MMF SFP+ Transceiver

SKU: NSN-7570
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper SRX-QSFP-40G-LR4 40GB BASE-LR4 850nm MMF QSFP+ Transceiver

SKU: NSB-4608
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

StarTech.com SFP10GSRST 10GB BASE-SR MMF 850nm 300m LC SFP+ Transceiver

SKU: NSB-1139
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Nvidia Mellanox MFM1T02A-LR 10GB BASE-LR 1310nm LC SFP+ Transceiver

SKU: NSB-3113
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Finisar FTLX8571D3BCL-HD 10GB BASE-SR MMF Transceiver

SKU: NSB-9081
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW F5 OPT-0016-00 10GB BASE-SR 850nm MMF 300m LC DOM SFP+ Transceiver

SKU: NSN-1992
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper MPC2E-3D-NG Next-Gen Modular Port Concentrator for MX960 Series

SKU: NSN-7546
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper MIC-3D-8OC3OC12-4OC48 High Density Multirate MIC

SKU: NSN-9010
Condition: New
Shipping: Overnight Options
Warranty: 365 days