Dell PowerSwitch S4048-ON 48-Port 10GbE SFP+ 6-Port QSFP  2x PSU pulled from a working environment, used condition and comes with 2x PSU.  Each device was factory reset. 

Each switch comes with:

12 Dell FTLX8571D3BCL-FC 10GBASE-SR 850nm SFP+ Transceiver

4 Proline GLC-TE-PRO, 1000BASE-TX SFP.