This item has been moved to https://cdm.llu.edu/digital/collection/p17224coll14/id/25/rec/1
Variation of the Yusei Ring with the upper crossbar and two inner spokes are formed as one unit, polyethylene encasing a metal wire. The lower arc does not contain the metal wire. The polyethylene coil is attached in two pieces to the lower arc. No cervical threads.