Description Enhance Mobility with the Rolling Stand for Polygonal Kilns. Features Fully supports the entire kiln bottom (not just the edges) Corrosion-resistant, heavy-gauge aluminized steel lasts longer Easy vent installation with built-in vent box mounting studs (compatible with Vent-Sure system; no extension duct required) Guideposts to keep kiln centered - each size stand-top fitted for matching kiln models, legs are universal About Rolling stands are the same height from the floor to the top of the stand as our normal stands. The vent collection box is not included. The rolling stands no longer require a straight extension duct for venting. The flex duct attaches directly onto the vent collection box. The standard rolling stands are not available on kilns taller than 3 rings (over 27" inside height). Rolling stands are only recommended for flat, level floors.