An Economical Choice for a Durable Surface Mount or Semi-Recessed Cabinet Tub and Door Frame: White powder-coated galvanized steel or rust-resistant aluminum for interior/exterior use with Twin Lock Top. Surface mounted styles have no trim, recessed models have 2-3/4" or 4-1/2" trim. Door: .060 acrylic front for protection from the elements. Breaker bar with chain. Fire-Rated Option: No