You get 4 batteries, 4 2mm copper 250a busbars, and 8 nuts for this price.

They are actual grade A EVE 3.2v 280ah cells that are testing around 310ah on average. This is Version 3 model LF280K. 8,000 cycle rated.

Here is the download link for the test results of every cell being sold in this listing. Each cell has a manufacturer serial number on it that will match with the results of the manufacturing test report. The file is .xlsx format which works on most phones and computers. Or you can open the file with Google Sheets. Click HERE.

This calculation also takes into consideration the maximum continuous amp ratings of the cells.

Always add insulator material between the cells. Barley paper or thin plastic sheets works well. Compression is also recommended.

EVE is a top quality brand. Max torque is 5 N m but 4 N m is recommended with lock washers. 

12v = 4 cells in series (12.8v 280ah 3.584kWh)
24v = 8 cells in series (25.6v 280ah 7.168kWh)
36v = 12 cells in series (38.4v 280ah 10.752kWh)
48v = 16 cells in series (51.2v 280ah 14.336kWh)