Nephelo culture flasks, made of borosilicate glass, that conforms to USP Type I and ASTM E 438 Type I, Class A requirements.

• Scratch and striation free side tube
• Available with or without cleanout port
• A 38-430 size top cap and 20-415 size sidearm
• Cap have white styrene butadiene rubber liner

Designed for use with turbidity meter or nephelometer.