CRUSHPROOF Oval Adapter measures 3" x 11" and is designed to fit oversized tailpipes on 2010 Acura TL model vehicles (with a maximum oval size of 2.5" x 10.5"), adapting to 3" and 4" ID CRUSHPROOF hose. CRUSHPROOF tailpipe adapters are designed to protect the hose and tailpipe, and the hook and chain holds them in place. Always select an adapter with at least 1/2" diameter clearance around the tailpipe.