OXYGEN BRASS REGULATORS PRECISION MEDICAL EASY DIAL: (1) MODEL 168704DLB, (2) MODEL 168708DB, (3) MODEL 168708DLB, (4) MODEL 168715DB, (5) MODEL 168715DLB, (6) MODEL 168725DB. LOTS / DATE CODES: (1 THROUGH 6) 0999 À 0401 BODY STAMPS NEAR METAL ENTRY