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There is a problem always worries us when we use a pen. When we add ink for a pen,the ink will paste on the pen. It is not easy to clean and also waste of papers. Ink Sweeper have a soft rubber cover inside of the ink bottles cap,when we add ink to a pen,we just need to insert the pen into the ink bottle as usual,then pull it out,the rubber cover will leave the ink off the pen,and we dont need to clean the pen in other trouble ways.
Xuan Teng Huijun Chen