1 in. Dia x 100 ft. MM Sizing Black Non Kink, Corrugated, Flexible PVC Pond TubingVery flexible ideal for working in confined areas; saves time, labor and cost Reduces the number of required fittings and permits the installer user to make smooth, tight turns PVC tube with raised exterior PVC helix for strength and flexibility Smooth inside permits unrestricted flow, reducing operating costs Designed for use with barbed or insert fittings and appropriate clamps Mildew, sun, ozone (UV) and chemical resistant; the black hosing does