idk bout rustos...i wouldnt buy this.. a ten pack of nyfs and skinnys would be a better buy but cool for newbies so cop one of these...(apreply) RUSTOS FTW
these nibs are obviously for the toxic shocker, theyre pretty descent nips if you use them correctly.i suggest using them on smooth new metal, plastics or glass.your nib will last longer. These nibs have a VERY tight fit on the shocker and if you arent careful they will break.i suggest the 5 pack.