https://www.mccoys.com/shop/p/7133051-052303-30/ferry-morse-kheatmat-heat-mat-black
Gives your seeds a quick start. For indoor use only. Power rated at 17.5 W. Mat size of 10 x 20 in.
Specifications
17.5 W
Color
Black
Dimensions
10 in L x 20 in W