Introducing the Glas-Col Hemispherical Mantles, Series O! Designed for optimal heating efficiency, these mantles feature a durable glass fabric exterior that ensures even heat distribution. Perfect for laboratory applications, they provide a reliable solution for heating round-bottom flasks and other glassware. With a focus on safety and performance, these mantles are built to withstand high temperatures while maintaining structural integrity. Their hemispherical design allows for maximum surface contact, making them an essential tool for any chemist or researcher. Upgrade your lab equipment with Glas-Col's trusted quality!