Bottle Caps - Cold Activated Crown Oxygen Barrier - 1 Gross (Approx 144 Caps)

Bottle Caps - Cold Activated Crown Oxygen Barrier - 1 Gross (Approx 144 Caps) Crowns start to change to blue at 46.4 degrees and at 41 degrees they are at their maximum blue tonality indication. Intermediate size 26mm pry-off crowns. Excellent reliability and compatibility with the glass ends. Liner: Dry Blend (PVC Free) Oxygen Scavenger & Oxygen Barrier Steel type: TFS and ETP