3M Littmann Cardiology IV Black 27 Stethoscope Wheelchairs Accessories * Specially designed sliding rings lock 149 * Specially designed sliding rings lock the seat at each end of the sliding rails Cover is machine washable * Repairable: The flame resistant black neoprene (not made with natural rubber latex) cushion can be patched to extend its use * This cushion is most effective for individuals who: * Have a history of skin soft tissue breakdown and or any stage pressure ulcer (including deep tissue injury) skin grafts and or myocutananeous flap surgery * Currently have skin soft tissue breakdown and or any stage pressure ulcer (including deep tissue injury) * Be at risk for skin soft tissue breakdown and or deep tissue injury * Have normal or impaired sensation * Require accommodation of pelvic asymmetry up to approximately 1in 2 Outstanding acoustics with better audibility of high frequency sounds (adult side firm pressure) * Tunable diaphragm: Hear high or low frequency sounds by slightly adjusting pressure on the chestpiece * Standard Finish Chestpiece Black Tube Stainless Stem and Headset * Dual lumen tubing: Two sound paths in one tube eliminates the rubbing noise of traditional double tubes * Next generation tubing lasts longer and resists stains * Not made with natural rubber latex or phthalate plasticizers * Headset is easily adjusted for individual fit and comfort * Angled eartubes align with ear canals * Seven year warranty provides greater peace of mind