AS1 SA2 AO3 30ml High Concentrated Solution Liquid For Dermabrasion Beauty Machine Skin Deep Cleaning Skin Care AS1: Normal skin, weak acid can promote skin peeling, softly remove impurities, remove keratinous sebum, and keep moisturizing for a long time. SA2: Sensitivity, acne, fat-soluble & weak acid can easily remove acne bacteria and aging substances, natural moisturizing factor can calm the skin. AO3: All skins (sedative solution), pure plant extracts, restore damaged skin cells, effectively help regeneration, improve skin immunity, brighten skin tone and make skin full of luster How to use the concentrate: First of all, pour 30ml of small bubble solution into a 400ml empty bottle, then add 370ml of distilled water or saline to convert it to 400ml for use