CEC26-DUSTCAP is a type of plastic cap manufactured by Caplugs. It is designed to protect threaded or non-threaded openings and components in electronic equipment, industrial machinery, and other types of machinery. It is made of polyethylene and has a slit along the top to make it easy to install. The cap can be used to prevent dust, dirt, and moisture from entering the openings and components, helping to extend the life of the machinery or equipment.