1、Each bottle has about 100ft (30m) of pre-marked mapping string, providing ample material for eyebrow positioning operations. 2、Its built-in cutter lets you get the desirable string length quickly and easily while using the thread. 3、This tool aids in effortlessly drawing straight lines, facilitating precise and consistent eyebrow shaping. 4、The strings are pre-marked with hypoallergenic cosmetic grade ink and can leave thin but clear marks on the skin. 5、Non-toxic and safe, easy to erase after marking without leaving traces. Perfect for microblading artistes. Features: Each bottle has about 100ft (30m) of pre-marked mapping string, providing ample material for eyebrow positioning operations. Its built-in cutter lets you get the desirable string length quickly and easily while using the thread. This tool aids in effortlessly drawing straight lines, facilitating precise and consistent eyebrow shaping. The strings are pre-marked with hypoallergenic cosmetic grade ink and can leave thin but clear marks on the skin. Non-toxic and safe, easy to erase after marking without leaving traces. Perfect for microblading artistes. Specifications: Color: White, Black (Optional) Cable Length: Approx. 30m/98.42ft Item Size: Approx. φ2.2*6.1cm/0.86*2.40in Package Wieght: Approx. 18g/0.63oz Package List: 1 * Bottle of Mapping String (30M) 1 * Bottle of Mapping String (30M)