Tipo '00' flour - can be hard to find but a must for pasta making. I used to send for it from Italy but found a cheaper alternative and can now order it on line. I think some stores stock it - but haven't found any where I live!
Mantova Olive Oil -
I love the large can - and the taste is superb.
Except when i occasionally fry, I try to stick to a Mediterranean diet and a drizzle of this oil on tomatoes is excellent!
Italian Sea Salt - tastes of the mediterranean! I love thick sea salt, it seems to add a different flavour.
Fini Balsamic Vinegar - by far the best i have found. I have become addicted to balsamic and its the only vinegar i will use in a salad dressing.