Minisart® Syringe Filters for Sample Preparation 17575-----ACK 0.2um PTFE, 25mm diameter, Sterile, For use Primarily With Organic Solutions 50 155 95117 16541-----K 0.2um PES, 28mm diameter, Sterile, For use Primarily With Aqueous Solutions 50 130 95118 16533-----K 0.45um PES, 28mm diameter, Sterile, For use Primarily With Aqueous Solutions