4 pack of weld-on stake pockets for trailers & trucks that supports side walls. Heavy duty 10 Gauge Steel (Solid 1/8″ thick, the lower the gauge number the thicker the steel). Pocket measures 3″ tall, 4” wide, 1-3/4″ deep, and 3-3/4″ inside width. They also come with 5/16” hole in the face center of the pocket to secure upright in pocket. Can be painted.