Your search for "mtef" revealed the following:

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

SKU: NSB-1139
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 Cisco WS-C3650-12X48UR-E (36x 1GB 12x MultiGB) UPoE RJ45 8x SFP+ Switch

SKU: NSN-1097
Condition: New
Shipping: Overnight Options
Warranty: 365 days