Most 3-tier metal shelves are made from steel, iron, or related metal alloys. Product listings commonly describe frames as steel, metal, or iron.
Some 3-tier metal shelves add adjustable shelves or mesh shelving, self-leveling or adjustable feet, wheels with swivel casters and locking brakes for mobility, hanging rods and side hooks for clothing, and mounting hardware for wall-mounted or lumber-style racks.
Open wire or mesh shelves wipe clean easily; smooth or waterproof surfaces can be wiped with a damp cloth. Many listings also highlight anti-rust or powder-coated frames for easier maintenance in humid areas.
Many 3-tier metal shelves use powder-coated or scratch-resistant finishes and explicit anti-rust or rust-resistant coatings. Some listings note waterproof or smooth surfaces, and a few combine metal frames with waterproof wooden panels for easier cleaning.
Sizes vary by model and intended use. Examples in listings show heights from about 30.63 inches up to about 79.7 inches, widths from roughly 9.65 inches to about 45.2 inches, and depths spanning about 13.38 inches to 28 inches.