Normlock® Rings are designed to fit all major brands of paint cans including BWAY, U.S. Can (Ball Corp), and Central Can Company. **Please note: If you are purchasing the quart ring and can from us, the 30WQAN & 30WQAL rings do not fit our 30WS4U or 30WS4B cans. Please order 30WC4U or 30WC4B cans instead.