1/2" ID Flexible Braided Metal Hose, 36"L, Made in USA, 8524-03 - - Amazon.com
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GRAINGER APPROVED Flexible Metal Hose Assembly: 1/2 in Hose Inside Dia., 5 in Dynamic Min. Bend Radius (In.) - 48ZZ26|08PL-CA11-0360-11D-38D - Grainger