The most popular and most common hair length in our shop: 45 cm (18"). These strands are applied using a heat iron or ultrasonic device. The extensions are already provided with U-tip keratin bonds. The form of these bonds facilitates the incorporation. If necessary, the bondings can be shortened. However, it is to be noted that you do not cut too much of the bonds, because otherwise a good hold is not ensured. Should these 1-gram strands be too thick, one can divide the strands in length and thus obtain from a strand two 0.5-gram strands, which could be used, for example, with a thin hair. With normal self-hairs you need about 100 grams of hair extensions in 45 cm length, this corresponds exactly 100 strands. With dense to very dense hair - approx. 150-200 strands. It is important to ensure that sufficient extensions are used, otherwise you can quickly see the transition between the hair and hair extensions.