Mica shields are used to protect the liquid level gauges from acidic and corrosive solutions. The two most common mica shields used are of V-2, V-4 & Commercial quality. The thickness of these shields are 4-6 mils, 6-9 mils & 9-12 mils. We stock all qualities Mica Shields from size 1 to size 9, width 1-5/16. Also up to 20 inch Long X 1 inch Wide with Round Edges.