Case Size: 6/4 lb. Case of 5 lb canisters of aluminum‑free baking powder. Rumford Baking Powder is a fast‑acting, double‑acting, aluminum‑free leavening agent that provides reliable rise in cakes, biscuits, and pastries. Packaged in 5 lb canisters, it’s perfect for bakeries and large‑scale food production. Store in a cool, dry place and reseal between uses to retain potency.