One is only 20mL, and the other is a limited set containing a high-moisturizing anti-aging care lotion, 30 milliliters. This is a serum specifically designed to improve wrinkles, containing collagen. - Product Name: ONE BY KOSÉ THE WRINKLESS - Product Type: Serum - Capacity: 20mL - Additional Item: DEEP HYDRATOR 30mL - Features: Wrinkle-improving serum - Ingredients: Contains water-soluble collagen - How to Use: Apply an appropriate amount to the skin Thank you for viewing.