Size: QuartColor: Light GraySheen: Matte93% Zinc RichLeader In The Industry In Permanent Corrosion Prevention Protection To Metal SurfacesThe Zinc In This Product Is 97% Pure Metallic Zinc Dust And Leaves A 93% Dry Film Zinc Coating Over Exposed AreasThe Sacrificial Anodization Process Ensures That The Zinc Coating Will Corrode If The Surface Is Scratched, Broken Or Corrupted While Continuing To Protect The Metal From CorrosionWithstands 2000 Hours Of 5% Salt Spray Testing (ASTM B-117)Meets Performance Requirements Of MIL-P-46105(MR), MIL-P-21035B And DOD-P-21035A