VEVOR Shower Niche Ready for Tile 16" x 32", Double Shelf Organizer, Square Corners Wall-inserted Niche Recessed, Sealed Protection Modern Soap Storage Niche for Shower Bathroom, Black

It is 12”.

The shelf is not fixed at the factory so that you can adjust the height by yourself during installation, but it can only be installed fixedly and cannot be removed.

The product information indicates that installation is quick and easy, requiring no professional help. It comes with a complete installation kit and can be installed horizontally or vertically by following simple steps without complex procedures or extra tools.

According to the product description, it is resistant to moisture and water damage. The shower niche is constructed with a triple-layer waterproof system and sealed protection to prevent water penetration and extend its lifespan.

According to the product description, it is sealed and waterproof without any additional treatment needed. The shower niche features a triple-layer waterproof system and is constructed with waterproof XPS foam board.