ssd drives confused about the names

[SNIPES10]

i was looking to build a desktop from a site that lets you pick the parts and they put it together and send it to you so im on the web site changing things arround when i was adding the ssd drive i noticed a (1x) number on it another drive shows 2x same name 850 pro the only difference is the 2x 1x thing what is that for ? this is how it looks (1x SSD 1TB Samsung 850 PRO) (2x SSD 1TB Samsung 850 PRO) anyone know about this?

 

[unksol]

The first option has one 1 TB Samsung 850 Pro... The second option has two 1 TB Samsung 850 Pros