Basis for the attachment of bags Bagster universal. Used to mount the bags for specific tank cover without being provided with the same. Fits all bikes with 4 straps and allows the assembly of all the bags BAGSTER normally dedicated to the assembly on copriserbatoi. Does not impede the fuel cap. Fits the following exchanges: LADY B-, R CROSS, EVOSIGN, friendy, MINEA, NEWSIGN, RIDER, TWETTY, SHERPA, IMPACT, ALPHA.