With Quick Connect™ center knob, HAVACO 2 x 2 ft Plastic T-bar Drop-in 3-Cone Supply Grille enables easy removal of two center cones for cleaning, making it suitable for restaurants that need to clean grease off ceiling diffusers. Users turn knob and cones drop out for cleaning in sink. Base cone can be wiped out with degreaser spray and cloth. In addition to restaurants, damp environments such as spas and locker rooms will not have to replace diffusers often or use stainless steel models.