Clear Dog Porthole Window Round Transparent for Fence Pets Peek Look Out Description: Durable, clear, hard acrylic dome, with a trim-ring and all necessary hardware. Can easy to install in wood panel fencing, vinyl fencing, wood and dry wall. Easy to clean . just spray down with a garden hose as necessary. Through the window, your pet can see a full view of the other side. it can help stop excessive barking. Designed in hopes it will help satisfy their curiosity while alleviating any desires to claw under the fence to get to the other side. The window makes it possible for them to have a peek. Can fit any dog muzzle nicely and perfect for backyard fence. also has other ideas for usage include dog kennels , henhouse and even playhouses for children. Specifications: Material: Acrylic. Size Chart: Diameter: 32cm or 12.6inch, Depth: 13cm or 5.12inch. Package Includes: 1 Piece Dome Window. 4 Pieces Screws. 4 Pieces Nuts. 4 Pieces Gasket.