Note that the quantity of 2x bleed screws refers to the quantity for the 2x front calipers. Bleed Screws - Giulietta bleed screws originally comprised a Steel ball & a flat headed bleed screw. These were later replaced by a single tapered bleed screw which is fully interchangeable.
 
Part Name: Bleed Screw, Brass, 4Cm Long, For Girling & Dunlop Calipers
AlfaStop Product Code: 9BRG103
Original Alfa Romeo Part No: 101.26.26.04.0.01/03
Model: 2600, Guilia 101 Series, Guilia 105 Series
Quantity Per Car: 2