The nylon lead is meant for dogs under 30 lbs. The nylon lead thickness is 3/16" with a length of about 4'. 
This lead is used as an all-in-one-type lead with a neck loop, a bead to slide down to tighten around the neck, and a swivel so the lead will not twist up if the dog turns.
I do have colored crystals, they do not catch light as much as the clear, which I normally use.  If you want colored crystals instead of clear, ask me first if I have that color in stock before you order.