KS90 Stirling Engine Blue - KitKONTAX KS90 BLUE STIRLING ENGINE Plates made from anodised blue aluminium Ultra Low temperature difference Stirling Engine Can run from the heat of your hand Runs on heat sources such as set top box, cup of coffee Will even run on ice Runs on surprisingly little temperature difference LOW FRICTION BALANCED MICRON PRECISION EXTREMELY LOW FRICTION GRAPHITE PISTON INGENIOUS SELF LUBRICATING PISTON PROVEN GLASS GRAPHITE COMBINATION PRECISION CLEAR