Fangrui Product Details Descriptionnet Content: 30mlfeatures1. Highpurity Methylene Blue Drops, Laboratorygrade Quality, Ensures Safe And Effective Use Every Time, Suitable For A Variety Of Professional Scenarios.2. Accurate Concentration Ratio, Easy To Measure And Use, Specially Designed Dropper Bottle Is Convenient To Control The Dosage And Avoid Waste.3. Widely Used In Aquaculture, Medical Testing And Chemical Experiments, With Multiple Functions Such As Antibacterial And Antioxidant To Meet Different Needs.4. Environmentally Friendly Packaging, Lightproof Storage For Longer Lasting, Effectively Extending The Service Life Of The Product, Providing Stable Protection For Your Experiments And Treatments.5. International Standard Certification, In Line With The Strict Requirements Of Crossborder Ecommerce Platforms Such As And Ebay, Rest Assured To Buy, Worryfree Aftersales.comments:1. The Manual Measurement Tolerance Is 25g. Please Don't Mind Your .2. Due To Differences Between Different Monitors, The Image May Not Reflect The Actual Color Of The Item. Thank You Very Much!3. The Sku Color Is The Color Of The Product Packagingpackage Includes:1 * Methylene Blue Drops