Volcano Rods 120 Volt/1500 Watts Stl/Stl

  Prevents sand pile from freezing.
  The Electric Sand Pile Heater heats all day while you work and heats 16 hours overnight.
  Heats 3 ways:
  -Heats the ground below the sand pile and heat moves up through the sand.
  -Heat radiates through the center of the sand pile.
  -Heat lost through the top forms a heated air shield between the whole top
   surface of the sand pile and the tarp.