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 438040 Plankton Net for quantitative collection with cowl Price on request 435023 Tubular Plankton Chamber, capacity 25ml Price on request 435012 Counting Chamber for zooplankton,volume approx. 70 Price on request