About this item Due to the nature of this product, once it has been delivered to a customer, we cannot guarantee that the contents have not been tampered with, even if the package remains unopened. All our solutions and serums are virgin stock, none are resold returned products. To do this, please note that, without prejudice to your consumer rights, please note that requests for the return of our solutions or serums that are delivered through no fault will be denied. These products cannot be returned. How to use: each 30 ml bottle can be used with water dilute to 800 ml. Data shows that half a bottle 15 ml bottle can be used with water in 400 ml (the effect is fine).The 30 ml concentrated solution is suitable for microdermabrasion, hydro beauty and hydrofacial Machine. A 30ml bottle should be diluted from 370 ml to 770 ml depending on the desired concentration, so that the starting base contains between 400 ml and 800 ml. AS1 solution suitable for normal skin, the main ingredients are alpha hydroxy acid/AHA/oleanolic acid, which promotes skin collagen regeneration. It can remove impurities and keratin gently and without irritation. Coordinated plant extracts minimize skin irritations. SA2 solution suitable for oily skin or acne, the main ingredients are beta hydroxy/BHA/salicylic acid, due to the intensive action of salicylic acid on oily skin, the skin can be easily cleansed and acne can be prevented. It also contains natural moisturizing ingredients to soothe the skin. AO3 solution suitable for all skin types, the main ingredients are glycerin solution, soy extract, green tea extract and cypress leaf extract. These penetrate deep into the skin, specifically restore damaged skin cells, effectively aid in regeneration, improve skin immunity, moisturize and inhibit the formation of melanin. › See more product details