A hard, durable case is fully attached to the body of the calculator, so that it is always protected and there is no need to worry about losing the case.
EL-510R
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EL-531RH, EL-509RH, EL-531R, EL-509R
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EL-531RH (BL/GR)
EL-520R
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EL-506R/EL-546R
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EL-500L
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EL-530L