Rear Caster only 8 for SL18 Penlights 3 year limited warranty Otoscope Accessory 3 year limited warranty Designed for individuals with a medium to high risk of developing pressure ulcers or with existing pressure ulcers up to and including stage III * Interface Pressure below 30mmHg for 80% of the cell cycle and below 20mmHg for at least 50% of the cell cycle * Modular cell construction * Manual Pressure Setting Control * Two way stretch vapor permeable cover which is water resistant and easy to clean * Intergrated air filter * Audible and visual alarms * Lightweight and compact pump * CPR facility * Transport Facility * Optimal Infection Control Design * Recommended weight limit is 360 Lbs Rear Caster 8 for SL18 Super Light Folding Transport Chair with Carry Bag and Flip Back Arms * 1 Ea