Mica Strainer Core acting as both choked and strainer during pour, helps to eliminate getting casts, dross, produces a better and brighter casting. Inderchand Rajgarhia & Sons Pvt. Ltd. Is an ISO 9001-200 awarded company that manufactures Mica Strainer Core. Inderchand Rajgarhia & Sons Pvt. Ltd. Also offers Washers, Indicators and Tubes. Mica Strainer Core is easy to place over the sprue hole. Mica is available with low Leakage, high insular strength. Sheet mica having 22 to 93 holes are used as strainers in brass, bronze, aluminium sand castings.