Adapt™ Convex Barrier Ring, 1 3 16 Inch, 1 Each Ultrasound Units Accessories An excellent solution for all Select Ear:Left Ear An excellent solution for all CPAP users ingenious yet simple * Prevents 'fighting' 'tug of war' and 'neck choking' of the CPAP tubing while sleeping * Helps to prevent CPAP mask leaks as you toss and turn * Top tubing and adjustable arm loop swivels and moves as you move allowing the user to move around at night without getting tangled in the CPAP hose * Elastic internal cord stretches as the user moves * Length is 40 * Base (5 wide x 8 long) slides between box spring and mattress installs in seconds no tools required antimicrobial Opening: 1 3 16 inch (30 mm) Adapt convex barrier rings can be used to create round or oval convexity