Durite Convoluted Split Tubing made from Black Nylon also known as conduit. Various widths, each size has a nominal code. 10NW for example has an ID (inside diameter) of 9.9mm and an OD (outside diameter) of 13mm. For ease, we've listed below the exact thicknesses of each NW (Nominal Width).
- 7.5NW: ID 6.7mm OD 10mm
- 10NW: ID 9.9mm OD 13mm
- 13NW: ID 12.7mm OD 15.8mm
- 17NW: ID 16.6mm OD 21.2mm
- 22NW: ID 21.3mm OD 25.4mm