Material: Aluminum alloy frame and galvanized inner plate with high-temperature baking paint for stability. Design: Removable inner plate slides upward for easy opening and cleaning. Application: Ideal for covering holes in ceilings and walls to hide plumbing, cables, and ducts. Installation: Secured with screws into pre-drilled holes for long-term stability. Size: Multiple options from 15 cm to 60 cm to fit various openings., Manufacturer: ENmrfvkz