This is triple walled, inside made of stainless steel and outside made of mild steel  painted in dark chocolate colour.  Insulation between the two walls is filled with mineral wool.  It is fitted with Electronic Digital temperature indicator cum controller and circulation fan also to get uniform temperature form plus/minus 3 deg. C. above ambient to 250 deg. C.  These dryer are available in capacity of 3, 4, 6 & 9 trays with one No. M.S. drip tray.