My favorite premades have all the things I wish for: deep black, short stems, medium width, and heat bonded. There are 12 lines in each tray (240 fans) on foil backed strips for your convenience.
You can attach these lashes from the top, side or bottom for beautiful sets in less time which can ultimately save you money by allowing you to take more clients and charge more for higher quality wok. After all, these fans are perfect!
Check out @kcprolashsupply igtv for great tips for working with premades.