On-Stage KSA8500 Deluxe Keyboard TierBeyond 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 (with use of included adapters), 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