The pair I bought from Grainger are as straight as a tube can be. There is no visible wobble when I roll them across the floor. My original short ones from Shopsmith are also nice and straight. The Grainger ones are made from heavy stock so they should stay straight for as long as you use them. And, with the polished stainless steel finish, they look like they belong on a clean Shopsmith.
The 6 footers from Grainger make up a nice long work table when I need it.
Mark V 510 Connector Tubes
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