This optional kit is designed to raise the Arm's Reach Universal and Mini Co-Sleepers to properly fit the height of your bed. The Leg Extensions raise the Co-Sleeper in 2" increments starting at 24" (normal bed height) to 30" (pillow top bed height). When full 6" extensions are used, you will find the Mini Co-Sleeper Bassinet to be a comfortable bassinet or changing table. If your Original Co-Sleeper® bedside bassinet was manufactured prior to June 2004, the current leg extension kit will not accommodate your unit. We sincerely apologize for any inconveniences this may cause you or your loved ones.