Test Tube Screw Cap Special Pyrex 12*100mm

The Pyrex 12 x 100 mm screw cap test tube (specifically Corning model 9825-13) is a professional-grade culture tube designed for laboratory applications requiring airtight seals and high thermal resistance. It is manufactured from Corning Code 7740 borosilicate glass, a Type I, Class A material recognized for its exceptional chemical stability and low expansion. 
Core Specifications
Dimensions: 13 mm outside diameter (O.D.) x 100 mm length.
Capacity: Approximately 9 mL.
Bottom Style: Round bottom.
Thread Size: 13-415 GPI (Glass Packaging Institute) threaded neck.
Closure: Deep-form black phenolic (Bakelite) screw cap with a white rubber liner. 
Key Performance Features
Superior Thermal Resistance: The tube can withstand repeated wet or dry sterilization cycles in autoclaves (up to 

 at 15…