Home / Forums / Melodica construction, repair and maintenance / Keyboard materials / Reply To: Keyboard materials Reply To: Keyboard materials December 8, 2016 at 1:35 am #7978 Melodica-MeParticipant I think you are going to get a lot of miles out of 3.5 MM. Is that about double the thickness of the piano veneers you used last time?. By the way, what materials did you use for the reeds and plates you had made?