This is a tool/jig to set the correct distance between stone and toolholder/bar on a number of popular wetgrinders like tormek, sheppach and others.
I chose to print this in the elaborate and somewhat flamboyant "Copper Rust" pla. You can choose any other inferior colour you might like. ;)
UPDATE 19/01/2018: Edited the model to make sure the holes slip onto the guide rod better.
Update 13/1/19: Changed it to be further from infringing some copyright.
Infill is entirely up to you. This thing does not really have to support anything, so I'm sure 10% would be ok.
The resolution will matter if you want to use this interchangeably with another similar tool. In this case, it must be accurate in order for you to produce a consistent grind on your tools. If you only use this one, it makes no real difference if it's ever so slightly inaccurate - the point is consistency.