Millex ®. Description. Millex-GV Filter, 0.22 µm. Overview. The Vented Millex®-GV filter unit SLGVV255F are syringe filters for sterilization of low volume aqueous solutions for direct patient care applications, where venting and low protein binding membrane are required or desired. Background Information. Available in 4, 13, 25, 33, and 50