Bosch 044 Fuel Pump M12x1.5 x 12.5mm Inlet Hose Fitting Adaptor - Blue.
 
Bosch 044 Inlet Fitting:
1x Inlet fitting M18 x 1.5mm x 12.5mm (Blue anodised Aluminium)
1x Inlet Seal
 
Fits Fuel Pump:
Bosch 0580254044
This will also fit any fuel pump with an M18 (18mm) x 1.5mm inlet.