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 435011 Counting Chamber for zooplankton, volume approx. 2 Price on request 435035 Package of 250 Base Plates, diameter 27.5mm Price on request 435012 Counting Chamber for zooplankton,volume approx. 70 Price on request