Sierra Twist Bushing set. 1 set of 2 steel bushings.

Also for the Ellipse, Zodiac, Diplomat, Virage, Wall Street II, Le Roi Elegant and many other (but not all) sierra style pen kits.

(Please note these bushings will work for all the Le Rio Elegant and the Le Roi V1 just fine, but the "beefier" Le Roi/Le Roi V2 requires their own bushings)