Bowl Skidtrol Non Skid Timers Clocks 24 x 20 x 1 2 Undercast Padding 24 x 20 x 1 2 * Fits standard wheelchairs * Secured w velcro straps * Raised lip around edges * Brown wood grain color * Washable with soap & water * A life sized functional model of the 5 Lumbar vertebrae with normal intervertebral discs * The model includes: * segment of the spinal cord with spinal nerves * the 5 lumbar vertebrae with intervertebral discs * coccyx * sacrum with removable cutaway * Flexible stand * Cannot be removed from stand * Size: 13 x 5 x 5 * Made in Germany by 3B Scientific GmbH Put an end to messy accidents caused by sliding * The molded melamine bowl has a non skid ring to prevent sliding even on an incline * 8 1 8 (21 cm) diameter x 2 (5 cm) deep * Topshelf dishwasher safe *