Angler's Support Service (A.S.S.) Fluoro Cored Assist Line
Angler’s Support Service provided fluoro cored PE assist line as Sato Sensei designed it. Needed for making double hooks to put on the head of the jig. It keeps it from tangling with the leader, and still makes the hooks easy to be swallowed.
Non cored PE is to be used for the tail assist line. It’s easier to be swallowed than fluoro cored PE.