Description_x000D_ General description_x000D_ The tubes listed below are specifically designed to hold more volume than other comparable tubes while still fitting all of the most commonly used microcentrifuges. Writing surface on flat lids and side wall for quick sample ID._x000D_ The lids provide an easily punctured syringe port for easy access to the contents without opening the tube. Siliconized tubes simplify research requiring low adhesion surface.