Hello 3D is a Chinese manufacturer of 3D Filaments. They appear to be a white label service with generic packaging so others can resell. They also claim to be the first producers of many types of filaments in China, such as silk, marble, and glitter. None the less, Hello 3D has a great selection of materials and colors. They are very hard to find in the US but you can order direct from them. When ordering direct, the shipping is a part of the cost. Hello 3D sells filaments in a variety of sizes on plastic spools.