SafetySure CarEase Transfer Slide Jobst Relief 30 40 Thigh Hi Replacement Caster 4 *Twin Waterproof backing prevents strikethrough 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 Tracker can be used with adjustable wristband or belt clip (both included) * Wristband fits wrists up to 8 * Sync the iChoice Star with the free mobile app and online website to track your steps distance traveled weight food intake blood pressure heart rate pulse rate oxygen saturation and sleep progress * Syncs with your iPhone (4S+) iPod Touch (5th gen 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 *