The Davis & Sanford PSGAIRLIFT60B multi purpose tripod is designed for heavy use on a daily basis and works well for teleprompters and studio cameras. A heavy broad steel base and quiet 4" deluxe wheels with ball bearings assure smooth and stable movement without tipping. The wheels also feature positive step on locking brakes for security and safety. extending from 31 to 47 inches, this gives excellent support and adjustability for items up to 60 pounds. A pneumatic cylinder in the center column provides smooth and easy floating action.