Portable compact packaging enhances field research efficiency, enabling scientists to conduct on site alkaline acid tests during outdoor experiments or mobile scientific work Wide application scenarios cover school labs to shipboard detections, meeting environmental testing needs for professional requiring alkaline acid measurements Made from paper reduces environmental impacts while maintaining accurate tester results, perfect for users balancing science roll type design allows direct usage, simplifying testing procedures for students and beginners to quickly conduct classroom experiments and learn reactions Accurate alkaline acid measurement with 14 levels ranges ensures precise acidity and alkalinity testing for laboratory researcher, solving traditional tester paper inaccuracy issues in experiments, Manufacturer: Greabuy