Whatman PTFE Mini-UniPrep syringeless filters, 0.2 µm, translucent housing, slit septum cap, 100 pack, US203NPEORG. Regular Price $284.54 Price $247.10. Add to Cart. Add to Wish List. Whatman Puradisc 13 mm PES Syringe Filters, 0.2 µm, 50 Pack, 6780-1302. Regular Price $172.99 Price $150.23.