Trans. Clear Slope 1 x 1 x 2/3
These tiny little slopes, often called cheese slopes by us LEGO fans, are great for making patterns when turned on their side.
The transparent ones can be used as headlights for cars.
The trans clear ones can be used as ice.
Other references for this part: 54200, 35338, 50746, 4244362, 6245250, 158788-97