A 50mm aluminium strip is a narrow alu strip of 50mm wide. It’s usually used for hoods, water heaters, exhaust fan blades in bathrooms, exhaust pipes of central air-conditioning, etc . The alloy grades are 1050, 1060, 1070, 1100, 3003, 3004, 5005, 5052, 8011 and so on. Common states are O-state and H-state. O indicates a soft state, and H …