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 435012 Counting Chamber for zooplankton,volume approx. 70 Price on request 435025 Combined Plate Chamber (Utermöhl-Chamber), set wit Price on request 438040 Plankton Net for quantitative collection with cowl Price on request