6 Stovepipe Heat Reclaimer / Radiator Rings, 3.6" Dia pellet / corn stove pipe Reclaims heat from your stovepipe and radiates the heat into your room Draw more usable heat from your stovepipe. Fits 11.5 inch circumference (3.6 inch diameter) double wall insulated stovepipe used on pellet and corn stoves. Made from 28 ga. aluminum 1 1/2" wide Heat / Fuel Saver. They pay for themselves in a short period of time. Install in 5 minutes they snap on and will last a lifetime. They never need maintenance.