Captiva Premium Syringe Filter with 0.45 µm PTFE Membrane Aijiren Part No: 5190-5083 (4 mm), 5190-5085 (15 mm), 5190-5087 (25 mm) HPLC Results for Aijiren Captiva Premium Syringe Filter: PTFE 0.45 µm Manufacturing Statement This product is certified to have extremely low levels of extractables under the conditions specified above.