Duct cleaning plugs 1″ (1 inch)These plugs seal one-inch ( 1″) holes that are drilled on supply ducts and trunk lines to insert pneumatic agitation tools. Duct cleaning professionals uss holes for through cleaning. Then, they use these plugs on them to close the hole, but also provide future access. Box of 1000 black pcsLearn when the duct cleaning plugs are used.
