These Borosilicate 3.3 Glass Test Tubes feature side arms. The borosilicate glass is known for its high heat resistance, with the following tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.
Hello Elizabeth, I have just updated the product page with some more information.
- 022020-5477 is 20 x 150mm
- 022020-5497 is 25 x 200mm
To choose the size, click the 'Choose an Option...' dropdown on the right-hand side panel of the product page and select the required size. Afterwards, you can add the item to your cart and proceed to checkout.
Hello Elizabeth, I have just updated the product page with some more information.
- 022020-5477 is 20 x 150mm
- 022020-5497 is 25 x 200mm
To choose the size, click the 'Choose an Option...' dropdown on the right-hand side panel of the product page and select the required size. Afterwards, you can add the item to your cart and proceed to checkout.