Description Finally, a REAL solution to flush mount tailpipes!Crushproof's F675-SC is a patent pending flush mount tailpipe adapter. It utilizes a suction cup system to securely mount a large oval adapter over flush mount tailpipes. The adapter attaches to Crushproof hoses FLT300, FLT400, and ACT400. The adapter has an oval opening that measures 12" wide by 3" high. It must be used with a fan assisted exhaust system.Includes: Adapter with Rubber Suction Cup, 3? x 4? Hose, and AY30 Y-Connector