Flange Mount Caster Base Plate Inch For Profile Type Quad Fastener Thread Size 5/16 In.-18 Anodized Overall Height 3 3/4 in Aluminum 15 Series Includes Fasteners No Overall Depth 3/4 in Overall Width 3 in Mounting Hole Diameter 5/16 in Fastener Mounting Type Drop In Adjustable Yes White Compatible Brand and Series 80/20 15 Series