Non-contaminating, noncorrosive stainless steel cylindrical closures are available in lanced and unlanced formats.

• Prevents dust and microorganism buildup
• Reduce amount of specimen evaporation by 50% compared to cotton plugging
• Withstand repeated autoclaving without loss of resiliency
• Available in plain or lanced formats
• Lanced closures feature three resilient fingers that Adjust to nominal variations in tube O.D.

Top surface indentations allow adequate gas exchange under aerobic and anaerobic conditions.