Where to Get good Solder?

[MusicPebbles]

Hi guys, recently im interested to do some soldering myself for my guitar pots and stuff...
i was wondering what kinda of solder ( not the iron, is the sort if wires u melt to form the connections) is good and where to get them.

experienced ppl pls help me on this thx!

 

[Hercules]

get 60/40 rosin flux core, 1mm.

 

[MusicPebbles]

where to get them?

 

[PatheinRaindropMoe]

seen it in homefix and various shops simlim tower.

Most of the time, the brand is "asahi".