Product name: ph test solution Product size: 10ml x 4 Product color: As shown in the figure Product material: Acid-base test agent Product features: : Made of materials, good and reliable. Accurate testing: You can accurately measure the pH in your aquarium to help you monitor the water quality. Easy operation: Easy to operate, convenient and fast, suitable for any aquarium enthusiasts. Multifunctional: can be widely used in freshwater and seawater aquariums, suitable for a variety of aquatic organisms living environment. Convenient storage: small and portable, easy to store and carry, at any time to detect water quality. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 4 pcs ph test solution Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.