Lightweight and easy to carry. Polystyrene material, durable Detachable, convenient to store.Easy to install. It is convenient to insert and remove the test tube. Suitable for 13/16/18mm wide test tube. Ideal for use in many applications from...

Lightweight and easy to carry. Polystyrene material, durable Detachable, convenient to store.Easy to install. It is convenient to insert and remove the test tube. Suitable for 13/16/18mm wide test tube. Ideal for use in many applications from...