6Pcs Small Bubble Levels 10x10x29mm Mini Square Spirit Level Measuring Instruments Layout Tools

I love these for leveling our TV's that are on a swivel mount and always get pushed around by the curtains. I wish they had a small double sided tape on them, but I added my own. Not a big deal.

What can you say. They're rectangular plastic tubes with liquid and air bubbles in them. They do what they're supposed to do. I specifically got these because they didn't have magnets or anything attached, because I wanted to stick them on my monitors so I could tell if they were fully level and I wasn't sure how magnets would affect them. In any case, a little double-stick tape and they work like a charm.

Exllent!!!

On a poor quality reference surface (aka my desk) all 6 levels show it to be flat within a margin of error. Most of the levels disagree on exactly where perfectly level is. Upon inspection with calipers all of the levels are slightly tapered (0.1-0.2mm over 29mm - less than 0.4 degrees)... and yet they all show more or less level. Each side is just a little bit different. Each level is just a little bit different from it's companions. That having been said, the only thing about these that annoys me is that the bubbles are all different sizes. Are they good enough to use on a uranium enrichment centrifuge? Not even close. For most everything else, they're probably good enough.

Given the cost of these levels I wasn't expecting much in the way of accuracy. Especially reading the mix reviews. But I just needed something relatively close. However, I was pleasantly surprised to see them fairly accurate to one another and that as compared to my 24" level which is quite accurate. (See photo) These are just levels with no adhesive or magnetic strip in them, which is what I wanted.

Just the size we were looking for to use for Science Olympiad Machines and Boomilever events. Great price and quality. Flat edges all around makes it easy to use and to attach.

Perfect for what I needed.

These are small but very handy. Great price. Well made.

There just bubbles in tubes, but do work well

Excellent, Good Seller and satisfied. Thank you.

Muy buenos sobre tapa nivelar estructuras o equipos de laboratorio pequeños.

Bien sûr, on ne peut pas tromper la bulle, mais les lignes de niveau ne sont pas toutes centrées ce qui fait que en utilisant certains, pour être de niveau sur le niveau, il vous faudra ne pas être de niveau ! Bref, jolis, mais inutiles.

The liquid section is not centered within the casing but the lines are. So if the bubble is centered between the two lines then the surface is not level. ....Oh man is this supposed to tell me when something is not level?? Damn meant to order the same thing I guess, but opposite.