This trivet looks like it was used very little. However due to the age it has some rust on the cast iron , which can be easily be sprayed. Tested and works great. Still in original box which has wear due to the age. stock.
Vintage 1950's electric trivet
7.5" long (not including the cord) and the brass heating plate is 2.3/4" circumference.
New elec-trivet the imaginative food warmer by Paragon
Black cast iron - 120 V - 50 Watts