Duplo Ball Tube exit with round doorway 2 x 6 x 5

Reference

31191

Duplo Ball Tube exit with round doorway 2 x 6 x 5 (part 31191) is a LEGO element. CollectORbuild's catalog records it in 28 sets, including Big Tubular Playtime and Deluxe Brick Box. It has been produced in 3 different colors.