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Presto Mag Gun Blue is a cold blue formulation that works on all steel (except stainless steel). Specifically formulated for when you want a deep blue luster on your firearms metal surfaces. For complete re-blue applications.

Key Features:

- Cold blue formulation that works on all steel (except stainless steel)
- For complete re-blue applications

Size: 3 fl oz, Plastic Bottle

Note: This product cannot be shipped to California