I have been ordering biothane webbing (beta class) from Quail Creek, but I would like to order larger quantities direct from you.   I use biothane to make leashes for my training client's dogs.  I would like to request a small sample of the super flex, hi flex and standard 520 Beta class in 3/8" to see which would be my preferred thickness for a flexible, lightweight lead.  I currently use 3/8" width, I think it is standard thickness but not sure.