A:Answer Hello- Thanks so much for checking with us. It depends on the weight. If your canner and filled jars are over 50 pounds, we recommend reducing the weight a couple pounds. Our range and cooktop glass cooking surfaces (radiant, induction, gas-on-glass) are tested for a maximum weight limit of 50 pounds. Note: All gas burner and electric coil cooking surfaces are also tested to this weight. We hope this is helpful! If you have any questions in the future, please let us know. We are here to help! Joyce@Cafe