Locking Casters (Set 4) 3 x 1 1 4 H D Threaded Stem Diathermy Deep Heat Units 5 wide platform * Manufactured Hip Kits 5 wide platform * Manufactured of welded aircraft grade aluminum * Features an 800 pound weight capacity * Healthcare Grade Reinforced At All Stress Related Areas * Seat & back can independently articulate with ease even with individual in chair * The mesh vinyl sling drains well and removes easily for washing * All 3 sizes can fold flat for easy hanging storage * Full head & trunk support * Light rust proof frame * Ships via UPS * Color choices: yellow tan mauve forest green red black grey light blue royal blue white navy teal (mesh only) mint (vinyl only) clear (vinyl only) OR for an additional cost Fern Dance Floral Montego Floral Sierra Sands Tweed Replacement Caster 3 x 1 1 4 * 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 * HD Casters Have Threaded Stem For Extra Security And Safety * Construction: Heavy Guage Cold Rolled Steel Formed For Strength * Total Lock Caster Both Swivel And Wheel At The Same Time * Operates With A Simple Tap Of The Toe