This combo kit includes 4mm plate foam and 2mm case foam with hotswap cutouts.
Installation requires taking the board apart, putting the plate foam inside, slipping the PCB back into place GENTLY, putting the case foam on the PCB, putting the 'acrylic' (plastic) diffuser back into place, press all of the plastic plugs in tightly to hold everything together and then screw the top half to the bottom half.
These foams are designed to fit the ALT LOW PROFILE - a keyboard designed and produced by DROP (previously Massdrop).
Small note: Drop has recently added a brace to the ALT. To account for this divider there is a scored a line in the foam for you to cut along if your ALT happens to have this divider.
Compatible with both the low and high profile.
Comes with 3 layers of foam. And made the typing experience on the alt feel less hollow and definitely helps dampen the sound of modifiers with stabs.
My only complaint is you need to cut 2 pieces of foam. First one you have to cut is the foam between the top plate and pcb, and the sides of the foam of the bottom layer.
Massdrop Alt Low Profile Foam Combo
Fits perfect in the alt high profile. Sound is so much better!
I was completely blown away by the quality of the foam. And it wasn't 100% made for my keyboard. Ive got this installed on the Drop Alt High Profile and the fit is near perfect. You will have to make a couple cuts here and there but its near perfect. And after the install of the foam its a different keyboard and I love typing on it again. Annoying ping is gone. I had installed my own DIY foam and some sorbothane but this blows it away. Big thumbs up MK Ultra.
Foam fits snuggly and creates a tight fit. Massively improves the sound quality of the board removing the hollow resonance the drop keyboards are notorious for.
Some of the pieces don't fit the later version of the Alt but a few cuts and your home free. The fit is snug, the sound is dampened. Let your switches and caps thock cleanly.