Businesses find add-on boltless shelving to be a convenient and economical way to increase storage capacity. These steel racks easily attach to existing starter units to extend their length. Connects easily to existingstarter unitfor more storage space Open access to contents from all sides Made of 14-gauge, powder-coated steel Levels easily adjust on 1-1/2" centers Optional 5/8" thick particle board decking Configurable with casters (sold separatelyhere) To ensure rivets are properly set on posts, firmly tap beams with arubber mallet. Availability:Stocked in our warehouse. Ships next business day.