the converter would be fine
the wire is thin but will do , it is however not pure so dont drink the c.s it would make , if you want a pure product you could drink yourself as well as reverse plants then look for four 9's pure not three 9's , the .999 has added stuff such as copper
look for 12 gauge , the link you posted shows other gauges if you scroll down
i myself dont trust wire from ebay
go to this link for wire , it might cost more but is trustworthy ,,,,,
https://www.atlasnova.com/SilverWire612.htm
lastly, dont buy c.s. there are no laws enforced to make them be honest about what you are getting and most will be snake oil so to speak , plus the stuff you asked about was only 5 ppm , you want 30-40 although some claim success with 20ppm
peace