This is a set Dellorto 34 mm Carburettors for the Moto Guzzi, Laverda 750 or Ducati Bevel 750 GT Sport 900 SS models of the early seventies. Also can be used on Pantah 500 600 and 650 cc models. Types PHF 34 DS and DD so Left and right model. With accelerator jets and rubber mounting. Nice state, see pictures. 

Ducati roundcase, Imola, Greenframe, SS, SD, GTS, MHR, SSD, Darmah, squarecase, S2, sport, supersport, Borrani, Ceriani, Scarab, Lockheed, Marzocchi, Brembo, monza , diana, mach, mach1, dm250, dm350, dm160, 160, 450, dm450, desmo, desmodromica, elite, elite 200, brembo, 900SD, Mark 3 , mark 2, CEV, 750, 750GT, 860GT, 900GT, MV Agusta 750 America GT SS