Replacement Casters only 4 for 7039 MJM Shower Chair Pk 4 Heart Rate Monitors Caribbean Blue 28 * One 85180 Caribbean Blue 28 * One inch traditional pediatric bell combined with a floating diaphragm * Sold stainless steel chestpiece * Excellent acoustic seal and comfortable fit with patented Littmann Snap Tight soft sealing eartips * Comfortably angled anatomically correct headset * Patient friendly nonchill rim and diaphragm * Single lumen tubing in a range of attractive colors * 3 year warranty * NOTE: Classic II Infant Stethoscopes also available upon request Packing Content: 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 Double The Tread Surface For Superior Breaking *Easy Reach Brake Tab