Duplo Brick 1 x 4 x 2 with 2 Top Cutouts (Arrow Slits)

Reference

16685

Duplo Brick 1 x 4 x 2 with 2 Top Cutouts (Arrow Slits) (part 16685) is a LEGO element. It appears in 18 sets, including 3 in 1 Construction Site and Vehicles and Beach Racing. It has been produced in 2 different colors.