The steel-aluminium design on this affordable speaker stand make it both lightweight and durable. Use either the 1-3/8" diameter upper shaft or the included 1-1/2" adapter sleeve for a universal fit.� Applications: Mid-size speakers� Upper Shaft Tubing: 1 3/8" or 1 1/2"� Weight Capacity: 160 lbs� Height Adjustment: 44"-80"� Base Spread: 32"-48"