Review on 🧪 Micro Essential Lab Polystyrene Dispenser - Enhanced Testing, Measuring, and Inspection Solution by Carlos Alston

For the price they worked very well. They were needed for a project ((tested the pH of a face serum I was making) and they got the job done. The main caveat for me was that I didn't find them as accurate as needed for skin testing..acidity levels are of great importance for this purpose and the lack of accurate measurements can be an issue. This is not necessarily reflected in the product, just a recommendation that you buy wisely for your projects.