Duplo Door 1 x 4 x 4 with Porthole and 7 Vertical Grooves

Reference

4807

Duplo Door 1 x 4 x 4 with Porthole and 7 Vertical Grooves (part 4807) is a LEGO element. CollectORbuild's catalog records it in 4 sets, including Farm (with Picture Book) and Farm Set.