Only genuine iSi Cream Chargers can provide the quality and taste that discriminating whipped cream makers and eaters demand. Since they are made exclusively for iSi cream whippers, iSi Cream Chargers are perfectly designed and filled, and they're backed by 100% quality control testing. To be sure you serve the very best, buy only the very best. Each charger contains 8 grams of nitrous oxide. Box of 24.