See if you want to decorate the ceiling grille. For example, there are three kinds of ceiling grille materials, plastic grille, iron grille, aluminum grille and plastic grille are the cheapest, and aluminum grille is the most expensive. As for iron grilles, they are generally 3.5 high and available in white and black. One is 1.5 yuan, and the other is 4.0 high grille, which has a larger area. 6.5 pieces per square, and the space between smaller pieces is 10* 10, with 9 pieces per square. When buying a grille, the area should be more than 10%, because it will waste edges and corners, I hope it will help you.