1) A nylon coated single strand steel wire with snap link 

2) a supple nylon coated braided wire that you can knot

Each option is available with 15 lb, 20 lb, 30 lb and 45 lb wire strength bite tippet. The 15 lb and 20 lb wire leaders are attached to a 20 lb class tapered leader, while the 30 lb and 45 lb wire bite tippet options are attached to a 30 lb class tapered leader.