13 and 25 mm diameter syringe filters PTFE Syringe Filter 13 mm 0.2 um. Syringe Filters for HPLC & Sample Preparation | analytics-shop.com. Items 1 – 50 of 1757 Syringe Filter, Micropur, PTFE, 25 mm, 0,20 µm, PP housing. $146.40 TITAN SYRINGE FILTER, NY,0.2UM, 4MM, 100/PK LT PURPLE. Index Filters & Extraction – Teknokroma