I.D.: 1" or 25.4mm, Bend Radius: 3" or 76.2mm, wt. "C": 24, VAC rating: 28 Shields livewell hose has a black smooth cover with vinyl Helix. It is rated for full vacuum and is resistant to mild chemicals and saltwater This hose is primarily used for bilge pump intake and discharge drains (sinks shower and scupper). it is also used for livewell intake and drain and sanitation (intake and vent) This hose is utilized for below the waterline connections Note: Do not Use ethylene glycol based antifreeze in hose. NOT for potable water