These Ceiling Armor Cross Cap ceiling grid accessories serve to complete intersections of 2' and 4' ceiling grid sections, items # 4816 and 4815. Completely cover and conceal rusty or damaged ceiling grid sections with this snap on vinyl ceiling tile grid cover. Made of washable solid vinyl, the cross cap can restore rusty, discolored or soiled ceiling grid systems in kitchens, restaurants, bakeries, pools, rest rooms and outdoor ceiling locations. Package of 50.