1. Material: These pre-made fans are made from matte black ellipses, which typically have a flat or oval shape. This shape allows for a slimmer root structure, making the application process easier.

2. Lightweight: The use of ultra-soft materials ensures that these pre-made fans feel lightweight on the eyes, providing a more comfortable lash-wearing experience.

3. Versatility: They come in both single-tip and multi-length varieties. This means you can create a variety of looks, ranging from natural to voluminous and dramatic, depending on your client's preferences.

4. Fan Types: The numbers 3D, 4D, 5D, and 6D indicate the dimension or volume of the fans. For example, a 3D fan consists of three lashes fanned out from a single point, while a 6D fan includes six lashes. This allows you to customize the volume and fullness of the lashes to achieve the desired result.

Overall, these matte black ellipse pre made lash fans seem to be a versatile and comfortable option for lash extensions, suitable for a range of looks and client preferences.