Intended to aid in maintaining anterior chamber space via irrigation. Flexible tubing 25 cm (10 in). Inner diameter 1 mm (0.04 in); outer diameter 2 mm (0.08 in). Unique annular rings start 0.75 mm from 55 degree bevelled tip for retaining without sutures. .90 x 3.5 mm (20G x 9/64 in)