3/4″ ID. Bend Radius 3″. A smooth white FDA grade PVC with vinyl helix. It is rated for full vacuum and is resistant to mild chemicals, permeation and saltwater. This hose is primarily used for bilge pump intake and discharge, drains (sinks, shower and scupper), livewell intake and drain, potable water tank fill and sanitation (toilet to holding tank, intake, self draining lines vent and pump out). This hose is resistant to odor permeation. Do not use ethylene glycol based antifreeze in hose. Do not use in pressurized water systems. Sold in 50′ box.