Bonnet Side Seals
These are often left off by garage mechanics; the reason is probably that they are confusing to fit, especially when you have both in your hands.
Standing in front of the car:
this is the left one as seen from the front of the car
this is the left one as seen from the left side of the car
this is the right one as seen from the front of the car
this is the right one as seen from the right side of the car