A commonly used 87 key layout. This is an upper/top mount foam and as such has no standoff holes. You can check compatability at:
https://docs.google.com/spreadsheets/d/1GpM--fKeDw_tIDZj4m2jmbMavSyXeOu3QHzfTJwz-IM/edit#gid=0
As this is plate foam, it should fit any TOP MOUNT case with an a.87 PCB. It was designed to fit the h87a by hineybush.