Bulk-pack jar of 50 units of #49012OX, used for male end on HP hoses; filter seal; hose adapters; LP swivels; HP ports. Brown Viton (Fluorocarbon) for pure oxygen service to 2,500 psi. The clear, screw top, plastic jars are reusable for general parts storage or O-ring refills. O-ring refill #49012OX.