SafetySure CarEase Transfer Slide Jobst Relief 30 40 Thigh Hi Replacement Caster 4 *Twin Nerve Sensory Evaluator Access Replacement Caster 4 *Twin Wheel Casters Have Threaded Stem For Extra Security And Safety *MJM's Exclusive Reinforced Caster System Allows Additional Structural Support To Our Entire Product Line Our Positive Engaging Lock Holds The Wheel Securely So There Is No Swivel Movement When Locked *The Unique Design Allows Easy Movement On Hard Surfaces And Helps Eliminate the Wheel From Falling Into Cracks *Soft Non Marking Tread (It Will Not Leave Black Marks Or Leave Groves In Wood Or Vinyl) *Quiet Mobility (Hard Treads Make A Lot Of Noise)*Non Rust Plastic Body And Wheels *High Load Capacity (160 lbs) *Non Slip Tread * Assembled inspected and packaged in the U 22 L x 18 W * The slick inner surface of the SafetySure CarEase makes getting in or out of any vehicle easier * The CarEase makes sliding and rotating into the car seat smooth and effortless * Can remain in place after the transfer the user must wear their seatbelt * For use with any vehicle * Machine washable *