Captiva Premium Syringe Filter, glass fiber membrane, 15 mm diameter, 0.7 µm pore, LC/MS certified, 100/pk: Captiva Syringe Filters: USD: SubCat2ECS_40294: Captiva Filtration: $257.00: 5190-5087: Captiva Premium Syringe Filter, polytetrafluoroethylene (PTFE) membrane, 25 mm diameter, 0.45 µm pore, 100/pk: Captiva Syringe Filters: USD