Fits the GK64 and is also an available layout on the DZ60. May fit other PCBs as well. Originally I thought only weirdos use this but upon closer inspection, it is 1/4u closer to Ortho than most boards so I give it 1/4u thumbs up which is more than I give most boards. Keep shifting those keys guys, you'll get it right one day!
** Important Information Regarding Foam **
Thickness on this current batch of foam is 4.2mm to 4.5mm, so fit will be a little tighter than normal. It still works great, it just requires a little extra pressure while soldering your switches in place.
GK64 Plate Foam
Like my man said it's a bit thicker than his usual foams but if you clamp that shit down it's totally fine. Improved the sound of my keebs and attracted all the girls to my desk. 10/10 quality