Product Description Our KSA8500 Deluxe Keyboard Tier features two sets of support arms to support additional keyboards on your main keyboard stand. Each pair of arms features independently adjustable height, tilt angle, length, and width to hold a variety of keyboards and other devices in optimal playing position. Compatible with any 1" square-tube or 30 mm round-tube stand, as well as our Folding-Z stands, our Deluxe Keyboard Tier is a versatile choice for second- or second-and-third-tier customization. From the Manufacturer Beyond versatile, the transformative On-Stage KSA8500 boasts 2 sets of fully and independently adjustable arms for the ultimate in 2nd tier -- or even 2nd and 3rd tier -- customization. Compatible with any 1" square or 30mm round-tubed stand, as well as On-Stage Z stands, each of the KSA8500's support arms feature an independent 10-degree increment posi-lok adjustment for height, angle, depth and width, providing 43.5" of total width distributed over a 2nd or 2nd and 3rd tier configuration. The telescoping stabilizer bar accommodates keyboard stands up to 32" in width, while non-slip rubber end caps protect an almost limitless array of keys, laptops, mixers and more.