Standard bays are supplied in starter and add on extension format. All bays includes 4 x uprights, 4 x standard shelves, 3 x plastic and 1 x anti-static collars per shelf.  Add on extension includes 2 x uprights and 2 x S clips per shelf to connect to stater bay.  Additional shelves can be added to suit your individualrequirements, R = reinforeced with extra truss. Unquically S clips allow the shelving to form corners to make best use of perimeter walls.