3M™ 051138-16210 W-2929 Coiled Straight Air Respirator Hose, 3/8 in Dia Hose, 50 ft L, For Use With 3M™ High Pressure Compressed Air Systems, Specifications Met: NIOSH Approved 3M™ 051138-16210 W-2929 Coiled Straight Air Respirator Hose, 3/8 in Dia Hose, 50 ft L, For Use With 3M™ High Pressure Compressed Air Systems, Specifications Met: NIOSH Approved