This stuff is definitely different than what comes in the k60. As far as if it is the original formula? It is not but it is really close. This stuff is bomb af though so dont sleep on it, also i bought one just to fill up my markers because using this mop would be a waste of ink.
This mop is okay. It does not really drip though, which is kinda odd. It could be because I am using a marsh and pilot mix? But I even tried thinning it down and it still won’t drip, and I even took the regulator out....so I am giving it three stars