These 30mL vials are manufactured using break-resistant, clarified polypropylene, to ensure the consistency and reliability of the product. Each 30mL vial is leakproof and travels well during harsh transport or within a pneumatic tube system. Vials feature a skirted conical bottom and an O-ring cap (except slide holder vial). The pinworm collector features a clear polystyrene paddle insert cap, lightly adhesive on one side allowing easy collection of ova. The vial has a label and easy-to-read graduations
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