1. High-precision detection: Utilizes an advanced formula for rapid and accurate detection of stainless steel materials, identifying common stainless steel types such as 304 and 316, with an extremely low error rate. 2. Safe and environmentally friendly formula: Free from corrosive components such as strong acids and alkalis, with no irritating odor during use, safe and harmless to humans and equipment. 3. Ready-to-use design: No mixing or waiting required, use directly after opening the bottle. Equipped with a dropper nozzle for easy dosage control, avoiding waste. 4. Long-lasting shelf life: Special anti-oxidation formula ensures long-term liquid stability, with an unopened shelf life of up to 2 years, providing peace of mind. 5. Versatile application: Includes a professional colorimetric card, suitable for rapid testing of various stainless steel products such as kitchen utensils, building materials, and medical devices. Package includes: 1/2/3 pcs