Universal Roller Skids from CPI Products fit most push cameras and improve performance and protection in pipes from 3 to 16 inches in diameter. The key to selecting the correct skid is to measure the outside diameter of the camera and then select the correct roller size for the pipe to be inspected. Using a plastic roller skid can save money by protecting a push camera from debris inside pipes and keep the lens from impacting the walls of the pipe. A properly sized and fitted roller skid also keeps the camera centered for an improved image and reduces the amount of debris that obstructs the camera lens. 413-443-0925; www.cplasproducts.com.