[Size]: #24, #34, #45.
[Material]: Made of high quality Polypropylene, which is non-corrosive and will not scratch glass.
[High Performance]: The Keck Clips consist of a large and small semicircular clips joined with three arms, precisely sized to snap over two pieces firmly together.
[Heat Resistance]: The Clips' melting point is 160℃-180℃, which means it can work at temperature around 100℃ without be broken.
[Attention]: Never use Keck clips directly on a boiling flask where they are subject to extreme heat. Plastic will melt. Use a metal flask clamp for extremely high temperatures.