This is one of our fairly basic items, but it isn't quite that basic. Anyway, here's what you want to know. These are .25" (1/4) HR P&O Steel Plate, CNC Laser Cut and then Folded on a 290 ton CNC Brake to final size. Length is 8.0" to help control axle wrap and 2.5" wide to provide a stable platform. They have 3 spring pin mounting options so you can adjust your WB if you wish and are cut to fit a 3.1" axle tube, they are easily adjustable .25 up or down in tube size in minutes with your grinder. Sold in pairs.