The (SL) Ceiling Closure Panel covers the opening in the ceiling when the lift and projector are in the "up" position. Ceiling material can be added to the panel to blend in with the surrounding area for a more discreet overall design. The panel can be used by itself in non-plenum ceilings or with environmental airspace housing. Available in black or white. Fits in 2' x 2' (60 cm x 60 cm) grid ceiling. Maximum projector size is approximately 18-1/4" width x 21-13/16" length (46 cm x 55 cm).