BUFFALO GROVE, Ill. — New Xcluder Blocks fit all standard corrugated metal siding for fast, effective exclusion. Made with patented stainless steel and polyfiber technology, the blocks measure 2 inches by 2 inches by 7.5 inches and provide a rust-proof, shrink-proof, and chew-proof exclusion solution, according to the manufacturer. Xcluder Blocks quickly fill rodent, bird, and bat entrances and are an alternative to copper mesh. All Xcluder products are non-FIFRA regulated and have been proven as an effective barrier by the USDA Wildlife Research Center, accoding to manufacturer Global Material Technologies. For more information visit www.GetXcluder.com.