This replacement is a cast iron round shaker grate that will fit many of the stove models but may also fit other models and manufactures based on size and shape 

Measurements: 11 3/4"L x 11 3/4"W x 1/2"H with 2 1/8" handles

Commonly used in the following models:
Penn Coal Stoves: Model L
Chubby Coal Stoves

Measurements: 13 7/8" L x 11 3/4" W x 1/2" H