Professional Series™ Heavy Duty Foot Support - Elevates feet and legs to relieve lower back pressure - Simple height adjustment provides 3 platform heights - Steel structure and platform provides sturdy support - No fixed angle enabling rocking motion to improve circulation - Anti slip platform surface - Accredited against BS EN ISO 9241 by FIRA International Ltd, an independent Ergonomic Accreditor - Platform size: 56 x 34cms Height adjustments: 10.5/12/13.5cm Incline range: up to 25° (Approximate)