Reelcraft - 7800 OLB21 features strength, reliability, and the fluid path is non-corrosive stainless steel. Reelcraft 7800 OLB21 clean air reel is designed to reduce the operator's burden of managing long lengths of hose. When the reel is not in use, expensive respiratory hose are stored up and out of harms way. The reel holds 50? of 1/2 inch inner diameter Neoprene hose.