... Metal specification:Material: Stainless steel plate, aluminum plate, hot and cold steel plate, copper plate, PVC plate membrane, nickel ... rhombus, hexagon, vertical crossing, plum blossom, star and leaf etc.Application: Building stairs, Ceiling, Balcony, ... office tables and chairs, indoor noise silencers and grain storage ventilation, mechanical protection etc. Stainless Steel / PVC Standard Perforated ...