Tough and more highly resistant to acids, bases, solvents and heat. 

• Available in half and full rack sizes for 5 different tube diameters
• Have molded coordinates for tube orientation
• Stable design for use in water baths
• Flat labeling area for easier identification
• Unique tear drop shaped openings for better retention of tubes
• Offers the highest chemical and heat resistance (-40 to +121°C)
• Autoclavable