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Counter-Pen Counter-Pen™ is a combination marker and digital counter designed for the lab and plant. Each time a black mark is made with the felt-tipped pen, it automatically sounds a beep, and LCD displays the counts. It is very useful to count components, packages and during inventory Durable ABS plastic unit provides audio/visual counts to 99999 with reset button, on/off switch, and pen cap. 8301.120: Counter-Pen - digital counter 8301.122: Replacement pen cartridge |