Perfect for traction in 8″ (200mm) or larger diameter PVC or clay pipes with your DT340 Pipe Crawler. The 8″ (200mm) Carbide grit wheelset will position the camera head of a DT340 L or DT340 S package in the center of a 10″ (200mm) pipe or will offer stability in larger diameters. Add or remove these optional wheels at any time in the field using four standard Phillips screws to bolt onto the outside of the DT340 pipe crawler wheel hubs. The price includes a complete set of four.