There are three known mold versions of this part:
Thick slope edge, front stud connection, round holes in studs without internal stoppers.
Thick slope edge, front stud connection, round holes in studs with internal stoppers.
Thin slope edge, no front stud connection, faceted holes in studs with internal stoppers.
The mold comparison image shows all three versions. As long as we are unsure when the mold change of 4287 happened, we cannot create different parts for these molds.
Click on a colored part below to see the Sets and MOCs that use part 4287a Slope Inverted 33° 3 x 1 (34°) in that color. You can find an overview of all LEGO Colors here.
If a color is missing, it probably needs to be added to a Set Inventory.
This part has been used by MOCs in the following colors but not officially released.