MARCOM HAZWOPER: Medical Surveillance DVD Training Program Type_Step Stool upholstered surface is designed for Option:Full Length (2 box) upholstered surface is designed for rapid decontamination Auto Stop Walker Wheels feature an internal spring loaded mechanism designed to lock the wheels instantly whenever downward weight or pressure is applied to the walker handles MARCOM's training products on "HAZWOPER: Medical Surveillance Programs" discuss various types of "medical surveillance" and how it is used to evaluate the health of anyone who regularly works around hazardous materials a complete learning management system (LMS) at no additional cost