Feeler gauge is a thin steel sheet having a differential of different thicknesses.Feeler gauge to measure the gap size,are widely used in railway,automotive,electrical,construction,chemical,roads and other industries. ● Material:Manganese steel ● Color:Silver ● Polished,bright and clean without burr ● For solving mold measuring gap and the aging occurs due to mechanical shaking,rocking and instability ● It can not in the case of oil stained feeler or metal filings were measured,otherwise it will affect the measurement accuracy of the results