This laboratory is made of iron for durability. The advantage of this laboratory closed metal is and sturdy constructed. These laboratory support rings are very good laboratory assistants and are very practical. Features -Color:Silver - Material: Iron. - Size: 15.00X6.50X2.00cm/5.89X2.55X0.79 inch. - Made of , ensuring it durable, , rust proof and sturdy constructed. - Widely use, can be used at factory, laboratory and other occasions. - The product is in a simple structure design, but it is very useful and practical. - The perfect workmanship of the laboratory will give you an excellent use experience. - It is manufactured with professional technology to ensure the quality of the product and can work for a long time. Package list: 2 x iron rings