Moisture Proof Test Paper Drums made of Rigid Plastic Material These are required in case medical products that are sensitive to moisture have to be stored or transported. These drums are built to provide protection to the test papers and diagnostic materials from the effects of humidity. Jiangsu Changfeng Medical Industry Co., Ltd. is committed to offering the highest quality manufacturing-by employing cutting-edge technologies to produce these drums, which meet the requirements of medical device manufacturers and healthcare providers around the globe. Because of our focus on health safety and the quality of the products we offer, we are able to be relied on in the medical sector.