Description_x000D_ General description_x000D_ These columns are improved low-pressure columns (max. pressure 7psig) with unbreakable PTFE fittings and screw-thread connections for increased safety and economy._x000D_ • Bottom tip breakage is eliminated because the valve and exposed drip-tip is all PTFE_x000D_ • GL-45 screw-thread connections ensure positive reliable connections_x000D_ • Eliminates frozen PTFE and glass plugs_x000D_ • Eliminates grease_x000D_ • Choose between standard columns or columns with a fritted disc_x000D_ The assemblies are supplied with bottom PTFE valve assembly, GL-45 cap, and flow controller. Solvent reservoirs and GL-45 connectors are sold separately._x000D_ Legal Information_x000D_ EZ Safe is a registered trademark of Gerresheimer Glass, Inc.