There is a metal ring installed at the entrance of this birdhouse to prevent birds from biting holes. It adopts the design of opening the top cover. When cleaning, open the top cover, take out the sundries in the aviary and simply wipe the inside. With a transparent design, the front of this bird house can observe the state of birds and record the breeding and hatching process of birds. At the same time, it also provides a hidden place for birds to rest and sleep. It is constructed of paulownia material. This product is available in sizes S, M, L. It is suitable for birds, parrots, parakeets, budgerigars and so on. Item Name: Bird House Material: Paulownia Features: Smooth Edges, Transparent, Easy to Clean Size Details S, L: 19.5cm/7.68", W: 12cm/4.72", H: 12cm/4.72" (Approx.) M, L: 25cm/9.84", W: 13cm/5.12", H: 13cm/5.12" (Approx.) L, L: 29.5cm/11.61", W: 15cm/5.91", H: 15cm/5.91" (Approx.) Notes Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes 1 x Bird House 3 x Screws 3 x Spacer 3 x Butterfly Nuts 1 x Stick Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store