Di log pat test pass labels 500 lp500 di log lp500 p passed electrical safety test labels for pat testing supplied on rolls of 500 labels per roll printed on high quality material so they don 8217 t tear like cheaper paper labels and treated with a semi gloss finish so they can handle the harshest environments they can be easily written on with any biro or permanent marker p di log lp500 pat test pass labels 500