Dynamic Stabilizer Ball Base Diagnostic Sets *New single bottle and re designed Instrument Accessories *New single bottle and re designed three bottle gel warmer warms ultrasound gel to body temperature Spans entire width of back and can can be operated from either side of the chair * 4 heavy duty 5 casters with positive locking swivel and wheel brakes * Welded powder coated frame has a 5 year warranty * Elastic seat base and adjustable elastic back straps provide the ultimate in comfort * Includes 2 side trays * Model #657 Features: * Both arms drop independently and heavy duty spring pins lock arm securely in place * Exclusive one touch action drops arm securely in place * Chair can be rolled with arm down * Arms drop level with seat for easy transfers * Seat Width: 25 Overall Width: 35 5 diameter and fits a 45 55 65 and 75 cm exercise ball * Use base to stabilize exercise ball and prevent ball from rolling around gym * Use base with band or tubing for dynamic workout * Base has 4 built in anchors and 2 grooves for exercise band and tubing * Lightweight portable gym ball base measures 19