Package of 250 Base Plates, diameter 27.5mm Back Catalog number: 435035 Manufacturer: HYDRO-BIOS Availability: In the manufacturer's stock Price on request - + Recommended 435011 Counting Chamber for zooplankton, volume approx. 2 Price on request 438060 Surcharge for mesh size < 55µ for nets 438 000, 43 Price on request 435015 Plankton Chamber acc. to Kolkwitz, capacity 0.5ml Price on request