13mm Syringe Filter, PTFE, 0.45µm, GF1.0µm. Very low extractables. It requires pre-wetting with alcohol to use with aqueous solutions. Highly chemical compatibility. Suitable for organic media and HPLC mobile phases that destroy other membrane materials. JG Finneran 4mm syringe filters are made using polypropylene medical-grade housings with Luer-Lock and Luer-Slip fittings in compliance with ISO 594-1. Each filter is sealed, using an external ring insert, to maintain the membrane integrity and best performance. Filters are color-coded for easy identification. The Certified Filters are supplied with a Certificate of Quality, batch-to-batch, to guarantee product performance and quality. The filters are visually inspected following quality specifications. Each batch of filters is tested for external dimensions, bubble point, filter integrity, water flow rate, UV extractable, and compliance with all technical procedures, manufacturing specifications, and quality controls for release. Tests are performed by an independent laboratory.