Hi - I had contacted you previously interested in making biothane collars and leashes for guide dogs.  I am wondering if you have a color catalog; and also I've been told that the weights I should consider for dog use are standard weight (1" and 3/4" width) for collars and super heavy, 5/8" width for the leashes - is there any way to see samples of that in a suitable black or brown or day glow yellow?