Armstrong 1774A Ceiling Tile, 1774A, Dune, 24 in x 24 in, Angled Tegular, 15 16 in Grid Size, 16 PK G2068184 435" Barrel Outside Diameter 0 435" Barrel Outside Diameter 0 Item Plate Caster with Flat Free Wheels Caster Sub Type Rigid Caster Load Rating Range Medium Duty Caster Product Group Rigid Caster Load Rating 2900 lb Caster Wheel Tread Material Rubber Wheel Tread Material Rubber Wheel Tread Hardness Rating Soft Wheel Bearing Type Roller Mounting Plate Bolt Hole Pattern D Inside Bolt Hole Spacing 4 1 8 in x 6 1 8 in Outside Bolt Hole Spacing 4 1 8 in x 6 1 8 in Number of Mounting Holes 4 Caster Brake Type No Brake Included Non Marking No Number of Wheels 1 Frame Finish Enamel Caster Frame Material Steel Hub Type Symmetrical Ply 6 Tread Ribbed Caster Temp Music Rooms Coverage 64 sq ft Green Environmental Attribute Product Contains a Minimum of 40% Post Consumer Recycled Content Fire Retardant Class Class A Resistance Properties Fire Resistive Noise Reduction Coefficient 0