PipeSpyder Centering Guides from CPI Products are designed to protect the camera head from grinding on pipeline walls and reduce the snowplow effect from pipeline residue. Designed to mount on a camera spring or push cable, they keep the camera centered in 4-inch pipes and above the waterline in 6-inch pipes. They help reduce push cable contact on pipeline walls to prevent cable locking and flexing, and increase inspection depth range when attached to the push cable. Their thin rounded paddles easily pass through seams, cracks and residue. Four sizes are available, including three for different-size camera heads and one for push cables. 413/443-0925; cplasproducts.com.