Wedge Plate 4 x 4 with 2 x 2 Cutout

Reference

43719

Wedge Plate 4 x 4 with 2 x 2 Cutout (part 43719) is a LEGO element. It appears in 402 sets, including 1989 Batmobile and 4-Wheeling Pursuit. It has been produced in 27 different colors.