With a quantity of four pieces, the Stud 8x25 is the most used part in the SPECIAL MARKET (E25) (GS400C,EC,N:~F.NO.71031) (GS400EN:~F N diagram.
The Special Market (e25) (gs400c,ec,n:~f.no.71031) (gs400en:~f N assembly is constructed from several parts from which the Tube,inner is the most expensive.