This boneless item is prepared from Item No. 181 or 181A and contains the gluteus medius, gluteus accessorius, gluteus profundus and the biceps femoris.  The short loin end of the top butt shall be approximately parallel to the round end exposing the gluteus medius.  On the round end, the biceps femoris shall be approximately equal to or larger than the gluteus medius.  All bones, cartilages, tenderloin and the sacrosciatic ligament and the lean and fat which overlaid the ligament shall be removed.