Surcharge for mesh size < 55µ for nets 438 030, 43 Back Catalog number: 438061 Manufacturer: HYDRO-BIOS Availability: In the manufacturer's stock Price on request - + Recommended 435010 Counting Chamber for zooplankton, volume approx. 9 Price on request 438001 Surface Plankton Net acc. to Apstein Price on request 435023 Tubular Plankton Chamber, capacity 25ml Price on request