Precision molded to permit equal expansion in all directions, Super Rings allow gases to escape during burnout, producing superior quality castings with perfect fit and accurate margins. Eliminates ring liners and dig out procedures entirely. For maximum casting versatility, the system is available in four size rounds and two size oval rings. The kit contains the following items: 1 Each of :5001,5002,5003,5004,5005,5006,5007,5008,6003,6004,6005,6006 25 Each of : 5015 40 Each of: 5016,5010 15 Each of : 6016 10 Each of : 5028 20 Each of : 5019 40 Each of : 5009