Are you looking for a professional, yet water test strip? Are you in search of a sturdy water test strip that offers you a comfortable use experience? If your answer is yes, please come and take at this product! Our professional water test strip can meet your needs. Features -Color:Multi -Material:Paper - Size: 14.00X4.50X0.50cm/5.50X1.77X0.20in -Note: Each book includes 80 strips. -Weekly test the water if water or fish problems appear, monitor your fish tank, ensure your to grow happier and healthier. -Easy to operate and test, just need to Simply dip water and compare with large color chart designed on bottle. -Very simple operation steps, auxiliary consumables are required. Convenient and practical. -Suitable for fish tank, swimming pools, spas and other industries, bringing you and comfy living space. -Portable size and easy to carry out. You can take it everywhere, which can give you a great usage experience. Package list: 5 of PH Test Papers