Rustproof: Constructed by HEAVY-DUTY SUS304 stainless steel with black finish, a durable material to protect against corrosion & rust. Surface Treated: MATTE BLACK finish, using Eco-friendly Paint, passed a 48-hour of salt spray test, smooth surface, creating a simple and elegant appearance. Easy Installation: All hardware fittings are included in the package, premium stainless steel screws and top quality anchors which are of good quality and the screws are concealed that gives it a more clean and attractive look. Available in various finishes, you can mount it to any flat surface, bathroom wall, sheetrock walls or wood door. Concave Design Shelf: The shelf can place mobile phone, air freshener or other small items, convenient and practical. Special concave design for you to pick up things easier and prevents things on the shelf from slipping. Suitable for iPhone XS / iPhone XS MAS / iPhone XR or any large size android smartphone, get rid of the trouble of dropping or getting wet while waiting for your phone in the toilet.