Bottle Top Dispenser is designed through years of research to be both robust and reliable. This Borosilicate Glass Bottle Top Dispenser utilizes a smooth and soft plunger for easy working in difficult laboratory conditions. Solvent Resistant Borosilicate Glass Ball, Seal, and PTFE/ETP Piston.Adjustment Knob (PP) 180 RotationFully AutoclavableLight weight and easy to use Accuracy and Reproducibility According to ISO 8655Excellent with all reagents except HFIn a highly anticipated collaboration, Foxx Life Sciences is proud to represent high-quality Abdos plasticware and plastic lab products. Abdos follows intense quality control measures, audits, and are ISO 9001:2015 and ISO 13485:2016 certified company and CE marked. Manufactured on state-of-the-art machines with precise molds and virgin medical grade resin, these outstanding products are a valuable addition to any workspace. For downloadable CoA please visit: http://www.abdoslifesciences.com/Global/certificates.html.