Features & Details Sealed and 100% Waterproof: VEVOR shower bays use XPS extruded foam board, cement mortar, waterproof coating triple waterproof substrate, 100% sealed and waterproof, which not only can protect the wall and extend the service life of the wall but also effectively prevent water penetration into the wall, keep the indoor dry and sanitary. High-Quality Material: The (HCFC-free) XPS extruded foam board is durable and not susceptible to decomposition, decay. At the same time, the XPS foam board is relatively lightweight and can be easily carried, lifted, and easy to place. Multi-process: The surface adopts a double-layer cement mortar + glass fiber mesh cloth reinforcement process, which has more muscular rigidity and better load-bearing force and can withstand 62kg/m²; Glass fiber mesh cloth + cement mortar + waterproof coating surface process to bring grid rough surface, suitable for any tile adhesive, strong adsorption, solid tile bonding. Easy Installation: Equipped with a complimentary installation kit, horizontal embedded installation, you only need to follow the following steps to complete. These shower niche shelves can be installed without complicated procedures. Widely Used: The overall size is 16x50x4 inches (40.64x127x10 cm), does not occupy the building area, is more convenient to use, not only for the bathroom but also for cabinets, bookshelves, kitchens, etc., can meet the needs of multi-scene niches.