Casters (Set 4)Locking for MJM Height Adjustable Shower Chair Anti Nausea children and infants MSHQ 1148B children and infants Delivers fast and effective treatment efficiently * Soft comfortable mask with an anatomical form * Easy seal threaded cap and anti spill 6 cc jar prevent leakage of costly medication * Provides 80% of particles in respirable range * Includes a disposable adult mask 6cc nebulizer cup and tubing * Quantity: 50 case * 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) * Quite Mobility * (Hard Treads Make A Lot Of Noise) Non Rust Plastic Body And Wheels * High Load Capacity (160 lbs) Non Slip Tread * Double The Tread Surface For Superior Breaking * Easy Reach Brake Tab * R 3TW 3 TWIN