H D Metal Casters for #7026E (Set 4) Mat Platforms Highly detailed life sized model shows 416700 Highly detailed life sized model shows all significant features for each vertebra including vertebral body spinous and transverse processes vertebral notch and spinal canal * Features include 29 tall vertebral column complete pelvis sacrum occipital bone and vertebral artery all nerve branches and herniated lumbar disc * Includes a chrome table top hanging stand * 9 (683 mm) Depth: At Minimum Seat Height: 27 Replacement Caster 3 x 1 1 4 * HD Casters Have Threaded Stem For Extra Security And Safety * All Single Wheel Castes Come With Removable Bolt And Locknut Allowing Disassemlby For Easy Cleaning And Removal Of Build Up Grime Thread Or Anything Else That Your Wheel Picks Up During Normal Usage * This Caster System Will Add Longevity To Your Casters * Swivel: Double Ball Bearing With Hardened Raceways For Extra Strength * Cover: Helps Protect Swivel Bearings * Construction: Heavy Guage Cold Rolled Steel Formed For Strength