I am not able to find the paper work to where I got this plastic. From 10 years ago I knew I was going to be making pens so I started collecting plastic. Some that I have has not been made for years now so I am really not to sure of where I got a lot of my plastics. As the years have went on I just try to buy a bit of stock as when I first started I only bought 1 of each color. Now it has to be a min of 4 so I can do 2 complete pens.