Welltno Fruit Vinegar Hair Color Natural Black 2 × 250ML is a hair color product designed for hair colouring applications. The Natural Black variant is supplied as a pack containing two 250ML bottles, making it suitable for personal or professional salon use. It is part of the Welltno hair color range and can be used with compatible hair colouring routines. This description is based solely on the product information provided and does not assume additional features or performance claims.