Over Mount Installation 16 in. x 28 in. ABS Single Shelf Bathroom Recessed Shower Niche for Shampoo, Toiletry StorageConcerned about mold and leakage in your contractor handmade niche in the shower, Look no further. Our prefabricated recessed niche is ready to tile. Constructed from ABS is lightweight, but very durable material, it is virtually indestructible without the clutter and leaks. Handmade niches typically experiences major problems in the long run, however with the prefabricated niche, it will not mold, mildew, rust or leak and 100% guarantee waterproof