Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 202046-72 Hose for 72" Sampling Mast, Aircon-2 Price on request 810-0902-01-R Data Logging Pump Only (No Dock) Price on request 6667-6206 Tubing, 1/4" ID x 1/16" W, Clear Vinyl (per foot) Price on request