A blind piece is a type of window covering that is used to provide privacy and light control. The term can refer to four different types of window coverings: SLATS, SLATS, SEMI, and louvers. SLATS are thin strips of wood or metal that are held together by a cord and can be opened and closed. SLATS are usually made of wood or metal and can be adjusted to allow more or less light into the room. SEMI-blinds are similar to SLATS but are made of fabric and are usually used in combination with other window treatments. Louvers are horizontal SLATS that are usually made of wood and are used to control the amount of light entering the room.