McKesson Instrument Stand, 1 Each Connector Tubing Measure Mode: The upper arm 416700 Measure Mode: The upper arm measure Black * Designed to increase comfort by aligning your spine and supporting correct posture * Unlike traditional L shaped chairs the S shaped frame of the Obusforme molds your spine into proper anatomical alignment * Muscles relax leaving you more comfortable and energized * Features molded impact resistant lightweight polycarbonate frame * Durable polyurethane foam protects frame and provides cushy comfort * Hypoallergenic cover can be removed and spot washed * With removable adjustable lumbar support pad to provide additional comfort for the lower back by supporting the lumbar curve * Use together with any Obusforme seat Removable stainless steel tray: 19 Designed for limited space environments