The VWR Uni-Block is an essential tool for any laboratory setting, designed specifically for 12mm tubes. With its robust construction, this unit ensures stability and precision during experiments. The model 984VWM12MMT features multiple slots, allowing for efficient organization and easy access to your samples. Its compact design saves valuable workspace while providing reliable performance. Whether you're conducting research or routine testing, the Uni-Block is a must-have for maintaining order and efficiency in your lab. Elevate your workflow with this dependable and versatile accessory!