Deflect-O air deflectors are designed to improve air circulation in heating and cooling systems, resulting in more uniform temperatures throughout the room. Used to direct warm air across floors and from under curtains, or to push cool air to upper levels to eliminate air stratification. Constructed of durable clear plastic; permanent magnets hold deflector to register. Model 99 is used with floor or wall registers to deflect heat out or down to floor level; model 53 is for use with baseboard registers.