Pyrex Test Tube, heavy wall, without rim, 16 x 125 mm

Pyrex� Test Tube, heavy wall, without rim, 16 x 125 mm
Conforms to ISO 4142
Manufactured from borosilicate glass 3.3
Heavy wall to provide extra mechanical strength
Available with and without rim
Robust construction reduces possibility of breakages: - Lower replacement costs - Improved user safety