If you're setting up a lab or doing some serious home chemistry, this thermometer adapter is super handy. Made from quality borosilicate glass (the same stuff as Pyrex), it can handle heat really well without cracking. The 24/29 inner joint means it fits perfectly with any apparatus that has a 24/29 outer joint - super standard in lab equipment. The compression cap is really useful for creating a tight seal, and you can use it for thermometers or tubing depending on your setup. It's about 9.5cm long with a 16mm inner diameter and 20mm outer diameter, so it's substantial enough to be durable but not bulky. Perfect for distillation setups, chemistry experiments, or any situation where you need to monitor temperature in a closed system. The glass is clear so you can see what's happening inside, and borosilicate means it's resistant to thermal shock. Whether you're a student, hobby chemist, or professional, this adapter is one of those basic pieces that makes lab work so much easier to set up properly.