Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 380-0035-01 Nephelometer Pump Assy, Replacement Price on request KB-50 Kynar Bag 50.0L Price on request SC-7 Tedlar Bag (12.0L) Price on request