Description If you are looking for a weight ring for erlenmeyer flask, reliable quality and reasonable price, I will tell you that our erlenmeyer flask weight ring will be your best choice. We adopt plastic and iron material, so you can keep it for a long time. Suitable for students and teachers when they are doing experiments in chemistry class. Features - Color: Blue. - Material: Iron, plastic. - Size: 8.50X8.50X2.00cm/3.34X3.34X0.79inch. - Constructed by using high-grade iron and plastic material, ensures it safety and can use it with confidence. - Suitable for beginners or professional use, easy to wash and maintain. A good helper for your experiment. - Suitable for students and teachers when they are doing experiments in chemistry class. - Professional and practical design with beautiful appearance, easy to carry and use. - It saves space and is easy to store, which will not take up much space. Constructed by using high-grade iron and plastic material, ensures it safety and can use it with confidence. Suitable for beginners or professional use, easy to wash and maintain. A good helper for your experiment.​ Suitable for students and teachers when they are doing experiments in chemistry class. Professional and practical design with beautiful appearance, easy to carry and use. It saves space and is easy to store, which will not take up much space.