PURPOSE: A pig is provided to reduce the cost for polyurethane material as much as the foaming volume of pipe holes because pipe holes are formed inside foam pigs.;CONSTITUTION: A pig comprises foam pigs(100A,100B) which are arranged side by side, a hollow connecting pipe(200), and a scaling member(300). In each foam pig, pipe holes(110) are formed and penetrated from the front to the back. The hollow connecting pipe couples the foam pigs by passing through the pipe holes of the foam pigs. The scaling member is coupled between the foaming pigs and scales the interior of pipes.;COPYRIGHT KIPO 2011
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