Flush Mount Installation 16 in. x 20 in. x 4 in. ABS Single Bathroom Recessed Shower Niche for Shampoo, Toiletry StorageConcerned about mold and leakage in your contractor hand fabricated niche in the shower, Look no further, here's the solution. 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