Features: Quickly and accurately detect acid and base levels of liquids or gases with our double color litmus test strips, perfect for household and lab use with instantly result. Each set includes 200 acid and base test strips (100 red, 100 blue) housed in a durability, moisture resistant storage box for easy access and prolonged freshness. Ideal for home users, lab technicians, gardeners, and cosmetics enthusiasts seek reliable acid base testing solution for diverse applications. Test acid and base levels of amniotic fluid, skincare products, soil, laundry detergents, or fruits effortlessly in kitchens, lab, garden, or educational setting. compactly, lightweight design ensures portability and convenient storage, while the resealable box preserves test strips accuracy for repeated use. Specifications: Component: acid and base Paper Test Paper Size:Approx.60x9mm/2.36x0.35inch Quantity: red x100pieces, blue x100pieces Package Includes: 2Box/200pcs acid and base Testing strips note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.