part 66040009 Piston Ø20 x 54 Interpump code 66040009 Details Interpump number66040009 DescriptionPiston Ø20 x 54 ItalianPISTONE D.20X54Qty per pump3 Fits these pumps Interpump 66 SS series 3 SSE2025SSU2030SSU2035 Interpump 66 VHT series 2 VHT6628VHT6635 Interpump 66 series 5 T2530T2535T2830W2525W3025