Orders need to use materials from our Materials Catalog.
The reason for this is that the prices and zero minimum order volumes we're able to provide are dependent upon having a totally streamlined system. Anything outside that system has a much higher probability of things going wrong and takes more time and cost.
If there is a material you'd love to see in our catalog, you can make a suggestion via this form.
We'll review all suggestions submitted via the form and periodically add into the catalog the materials that will be of greatest use to all customers.