These laboratory support rings are very good laboratory assistants and are very practical. Application: This laboratory support ring is suitable for biological and chemical laboratory test bed to support a variety of beakers, flasks, etc. Lightweight and portable, it is very convenient for you to carry. Commonly used for chemical reactions, filtrations, and experiments in laboratories, factories, schools, hospitals, researches, and so on. Features - Color: Mainly silver.- Material: Iron.- Size: 17.00X8.50X2.20cm/6.68X3.34X0.86inch.- This support ring is manufactured with premium iron material, special and unique for long time use.- Suitable for beginners or professional use, also the students. Lightweight and portable, it is very convenient for you to carry.- A good tool for science study, can support various chemical experiments.- It is a good choice as a gift for your kids at school if they do experiments in laboratory.- Commonly used for chemical reactions, filtrations, and experiments in laboratories, factories, schools, hospitals, researches, and so on.Packing list: 2 x iron support rings Z