On-Stage KSA7500 Universal Second Tier Add-on For Keyboard StandWith its universal mounting attachment, this tilting tier should be everyone's first choice for adding multiple keyboards to any X and Z style keyboard stand. This universal unit can be stacked on top of a 2 tier stand making it a 3 tier stand! Includes internal attachment to fit ANY keyboard stand with either 1" or 30mm round or square tubing. 60 lbs. capacity. Add second keyboard to any X and Z style keyboard stand Can be stacked on top of a 2 tier