Use with Presto cookers and canners to keep food out of cooking liquid, prevent intermingling of flavors, and keep jars off bottom of unit while canning. Model 85341 fits 2.5 & 4 quart canners; model 85360 fits 6 & 8 quart canners and model 85707 fits 16 & 22 quart canners. Diameter: 11-1/4 In. Material: Aluminum