Flush-Mount Floor Brush Kit with Cover is a heavy-duty two-stage sealing system. Brush and EPDM gasket provide the most effective air seal. Heavy-duty, integrated safety cover allows installation of the grommet during the construction phase and eliminates the risk of injury by stepping through the grommet opening. OSHA jobsite standards require open holes in floor panels to be covered. Easy-to-install system integrates with the access floor static dissipative system. NEC, UL and NEMA require safety covers and cable protection against sharp edges.