Laboratory Support Ring Set, 4 Ring Assortment

...if the distance from the support rod are not critical in your work. All four rings have a different distance as measured from the support rod.

When clamped to a vertical support rod, the ring is a few degrees askew, not level. The ring itself is also slightly warped; i.e. the ring is not in a plane. So it was not suitable for my purposes. The clamps have plastic tee handles, not plastic circular knobs as in the picture here.

I was disappointed that the rings are not perpendicular to the mounting axis on two of the rings. They have a slanted plane, when mounted.

not the most perfectly machined pieces but they are cheap and functional

Has plastic handle for tightening screw onto stand. Time will tell if it holds up. I'm concerned about it getting hot from the Bunsen Burner. I am very pleased with the purchase.

Hi,haven't used it yet,but did put it together, should be great. Thanks mrp54

Good quality.

Very high quality for the price.