PYREX® Test Tubes, Medium Wall, without Rim, 10 x 75 mm, 100 Pack
"##2022:: Conforms to ISO 4142
"##2022:: High quality test tubes designed and constructed for optimum performance
"##2022:: Manufactured from borosilicate glass which gives superior performance to neutral borosilicate and soda-lime glass
"##2022:: Allows use at high temperatures - up to 500°C
"##2022:: Ideal for microbiology culture work
"##2022:: Excellent resistance to chemical attack, Manufactured from borosilicate glass 3.3, High quality test tubes designed and constructed for optimum performance, Allows use at temperatures up to 500°C , Excellent resistance to chemical attack, For advice on the safe heating of glassware, please refer to the care and maintenance section on pages....