Labmarker Chromatography Vials are packed in Cleanrooms and we guarantee this high hygienic standard. Additionally, tamper-proof evidence is given by the shrink-wrapping of the PP-box. Their cover enables reclose ability in order to avoid further contamination. The zip-lock PE-bags with the tear-off foil strip for our seals with regard to tamper-proof evidence and reclose ability. Printed batch numbers on each zip-lock bag guarantee traceability. LABMARKER is an ISO 9001:2015 certified company. Batch numbers guarantee a 100% traceability. Pre-sealed and pre-installed combinations available on request. Barcode labelling.