The stainless steel flex hose is supplied uninsulated (bare). One end of the hose is fitted with a 1/2" BSP external thread nipple (designation: “N”), and the other end with a 1/2" BSP swivel female union (designation: “R”). The hose length is defined by the “U” parameter, and the required length is specified when ordering. NOTE: NOT SUITABLE FOR USE IN DRINKING WATER INSTALLATIONS!