Household tap water quality tds test pen tap water tds pen mineral pen water purifier tds water quality test pen

The pen is made of high-quality metal material, which is strong and sturdy and can be bent easily. simple and exquisite appearance design, compact and exquisite, light and convenient to carry. made of high-quality metal material, it has good wear resistance, can effectively maintain a high-quality use experience, and has an exquisite and user-friendly design.