A classic design that fits right in with schools orchestras theaters recital halls etc. Features include a space-saving 3-point base lightweight aluminum bookplate steel shaft and base and easy height adjustment. The SM7711B s 6 lb. weight capacity handles large books and binders plus page lyres lamps and other accessories. Compatible with most popular storage carts. Bookplate ? 12.5 x 20 with 2 shelf ? Safe rounded edges ? 1.2mm aluminum construction ? 6 lb. weight capacity Bookplate Support System ? Tilt adjustment allows you to customize the bookplate angle ? Plastic pivot clutch provides smooth knob-free adjustment Clutchless Height Adjustment System ? Precision brass slider adjusts height from sitting to standing position or anywhere in between ? 1 diameter steel tubing (outer shaft) Solid Three-Point Base ? Stable weighted mild steel foundation ? Tripod design prevents tipping ? Diecast threaded insert allows removal for storage or transport ? Compact base footprint ideal for crowded stages and bandstands ? Compatible with most storage carts