RRPF has an air flow control mechanism. Using the checkbox, you can limit or block its inflow or exhaust. Consists of five elements and is completely disassembled. These grilles can be mounted either independently using self-tapping screws or with air ducts of the appropriate diameter using a mounting flange. The RRPF has slanted louvers that help conceal the ventilation outlet. Made from high quality plastic, which ensures high performance throughout its entire service life.