● USP grade VI Polypropylene
 ● Manufactured in clean room
 ● Autoclave at 121℃ /15 Ib
 ● Clear graduations and white marking area
 ● Sterilized by E-Beam
 ● Non-pyrogenic, DNase/RNase free

Internal-Thread Cryogenic Vials
● Used for storage in the gas phase of liquid nitrogen
● Special screw cap designed with silicone washer for a secure seal
● Star upright design for the bottom of the tube allows for self-standing
● 6 colored cap inserts for easy identification