Henri de Rivel Adjustable Saddle Gullet Plate Set The Henri de Rivel Adjustable Saddle Gullet Plate Set allows you to have total freedom to change your HDR IGP saddle. Having access to all sizes conveniently packaged in one box makes adjusting your saddle easy, fast and affordable! Directions are included that walk you step by step how to successfully change out your gullet. Complete Set- narrow, medium, medium wide, x-wide Gullet Plate Measurements - Narrow: 8 1/4"; Medium: 9"; Medium Wide: 9 3/8"; X-Wide: 9 3/4" Directions included Regular (green) gullet plate NOT included