The ULAB UTR1009 Stainless Steel Test Tube Rack can hold 12 test tubes, each with a diameter of up to 25mm. The manufacturer claims it's made from high-quality stainless steel, which makes it resistant to corrosion and high temperatures—super handy if you need to sterilize it frequently at temperatures up to 121℃.

The manufacturer also highlights that the rack's surface is polished to eliminate sharp edges, making it safer to handle. However, according to our research, a few folks have noticed some sharp edges, so there might be a bit of inconsistency there. It's something to keep an eye on, especially if you're using it for detailed lab work.

On a brighter note, lots of people have given thumbs up to its sturdy construction and compact design. It seems to stay stable even when it's filled to capacity, which is definitely a bonus during hectic lab times. Just be aware that there are mentions of not all test tubes fitting perfectly—if they're too large or small, they might not be as secure.

Cleaning is reportedly pretty straightforward, which helps in preventing cross-contamination—a big deal in any lab setting. This makes this rack a practical choice for both professional and educational setups where you need things to be reliable.

All in all, the ULAB Test Tube Rack is viewed as a reliable tool for keeping your test tubes organized. Just make sure to check the edges when you get it to ensure they meet your safety expectations.

If you're considering it for your lab, it's a versatile pick, but definitely double-check the edges for safe use.