Features 1、Made of high quality 304 stainless steel, durable in use. 2、Its advantage are high resistance to acid and alkali and oxidation. 3、Various sizes of ring retort supports for your choice, meet your different needs. 4、A good laboratory assistant, very practical. 5、Suitable for biological and chemical laboratory test bed to support a variety of beakers, flasks, etc. Specification Features: Made of high quality 304 stainless steel, durable in use. Its advantage are high resistance to acid and alkali and oxidation. Various sizes of ring retort supports for your choice, meet your different needs. A good laboratory assistant, very practical. Suitable for biological and chemical laboratory test bed to support a variety of beakers, flasks, etc. Specification: Material: Stainless steel Weight: 70-145g/5.1oz Package List: 1 x Lab Ring Support Package List